1. Atmosphere (10000)
2. Atmospheric composition (10100)
3. Air quality (10110)
4. Atmospheric chemistry and composition (10120)
5. Atmospheric particulates (10130)
6. Carbon dioxide (10140)
7. Greenhouse gases (10150)
8. Oxygen (10160)
9. Ozone layer (10170)
10. Atmospheric processes (10200)
11. Air-water interaction (10210)
12. Atmospheric circulation (10220)
13. Atmospheric precipitation (10230)
14. Carbon cycle (10240)
15. Evaporation and transpiration (10250)
16. Precipitation enhancement (10260)
17. Rainfall (10270)
18. Solar radiation (10280)
19. Winds (10290)
20. Air pollution (10300)
21. Acid rain (10310)
22. Air pollutants (10320)
23. Chlorofluorocarbons (10340)
24. Deposited particulate matter (10350)
25. Fly ash (10360)
26. Fog, smog and haze (10370)
27. Indoor air pollution (10380)
28. Climate and climatic change (10400)
29. Agrometeorology (10409)
30. Climatic change (10418)
31. Climatic zones (10427)
32. Drought (10436)
33. Global warming (10445)
34. Greenhouse effect (10454)
35. Humidity (10463)
36. Microclimate effects (10472)
37. Sea level rise (10481)
38. Weather modification (10490)
39. Lithosphere (11000)
40. Caves (11108)
41. Deep sea deposits (11116)
42. Geographic distribution of resources (11132)
43. Mineral resources (11140)
44. Natural resources (11148)
45. Non-renewable resources (11156)
46. Ore deposits (11164)
47. Seismic activity (11172)
48. Seismic monitoring (11180)
49. Wind erosion (11196)
50. Terrestrial ecosystems (12000)
51. Soils (12100)
52. Agricultural land (12104)
53. Alkali lands (12108)
54. Contaminated land (12112)
55. Heath lands (12116)
56. Land carrying capacity (12120)
57. Land pollution (12124)
58. Land reclamation (12128)
59. Land restoration (12132)
60. Land use classification (12136)
61. Marginal lands (12140)
62. Sand and gravel pits (12144)
63. Sedimentation (12148)
64. Soil capabilities (12152)
65. Soil conservation (12156)
66. Soil contamination (12160)
67. Soil degradation (12164)
68. Soil erosion (12168)
69. Soil improvement (12172)
70. Soil salination (12176)
71. Water erosion (12180)
72. Arid lands and desertification (12200)
73. Arid zones (12213)
74. Desertification (12226)
75. Drought control (12239)
76. Dry farming (12252)
77. Sand dune fixation (12265)
78. Sand dunes (12278)
79. Semi-arid land ecosystems (12291)
80. Tropical forest and woodland ecosystems (12300)
81. Afforestation and reafforestation (12307)
82. Coniferous forests (12314)
83. Deforestation (12321)
84. Forest conservation (12328)
85. Forest fires (12335)
86. Grass fires (12342)
87. Greenbelts (12349)
88. Indigenous forests (12356)
89. Revegetation (12363)
90. Sub-tropical ecosystems (12366)
91. Temperate forests and woodlands (12370)
92. Trees (12377)
93. Tropical ecosystems (12384)
94. Tropical forests (12391)
95. Temperate and cold zone ecosystems (12400)
96. Antarctic ecosystems (12410)
97. Antarctic region (12420)
98. Arctic ecosystems (12440)
99. Arctic region (12450)
100. Grassland ecosystems (12455)
101. Permafrost ecosystems (12460)
102. Polar ecosystems (12470)
103. Temperate ecosystems (12480)
104. Mountain and highland ecosystems (12500)
105. Mountain ecosystems (12530)
106. Mountaineering (12560)
107. Volcanoes (12570)
108. Wetlands ecosystems (12600)
109. Mangrove swamps (12630)
110. Waterfowl (12650)
111. Waterlogged lands (12660)
112. Watershed management (12670)
113. Waterside development (12680)
114. Biological diversity and protected areas (12700)
115. Adaptable species (12702)
116. Amphibians (12704)
117. Animal behaviour (12706)
118. Animal resources (12708)
119. Arthropods (12714)
120. Biological resources (12716)
121. Biosphere reserves (12718)
122. Biotopes (12720)
123. Birds (12722)
124. Botanical gardens (12724)
125. Conservation of genetic resources (12726)
126. Ecological balance (12728)
127. Endangered animal species (12730)
128. Endangered plant species (12732)
129. Estuarine conservation areas (12733)
130. Fauna (12734)
131. Flora (12738)
132. Food chains (12740)
133. Hunting (12744)
134. Invertebrates (12748)
135. Land mammals (12750)
136. Mammals (12752)
137. Marine conservation areas (12754)
138. Migratory species (12756)
139. National parks and reserves (12760)
140. Parasites (12764)
141. Poaching (12766)
142. Primates (12768)
143. Protected species (12770)
144. Reptiles (12772)
145. Terrestrial biological resources (12776)
146. Vegetation (12778)
147. Weeds (12782)
148. Wildlife (12784)
149. Wildlife conservation (12786)
150. Wildlife habitats (12788)
151. Zoological gardens (12790)
152. Microbial resources and biotechnologies (12800)
153. Enzymes (12812)
154. Fungi and yeasts (12824)
155. Gene banks (12836)
156. Germplasm (12848)
157. Microorganisms (12860)
158. Mutagens (12872)
159. Selective breeding of plants (12884)
160. Teratogens (12896)
161. Freshwater (13000)
162. Freshwater resources (13100)
163. Conservation of freshwater (13116)
164. Dams (13124)
165. Lakes (13132)
166. Natural drainage systems (13140)
167. River basin development (13148)
168. Rivers (13156)
169. Snow and ice (13164)
170. Subterranean water (13172)
171. Surface waters (13180)
172. Water resources conservation (13188)
173. Water resources development (13196)
174. Freshwater ecosystems (13200)
175. Catchment areas (13210)
176. International river basins (13220)
177. Lake basins (13240)
178. Ponds tailings (13260)
179. River basins (13280)
180. Pollution and degradation of freshwater (13300)
181. River pollution (13313)
182. Run-off and seepage (13326)
183. Sediment transport (13339)
184. Sedimentary basins (13352)
185. Water hyacinth (13365)
186. Water pollution (13378)
187. Water salination (13391)
188. Drinking water supply and sanitation (13400)
189. Desalination (13410)
190. Drinking water (13420)
191. Drinking water treatment (13430)
192. Municipal water distribution systems (13440)
193. Rural water supply (13450)
194. Sewage treatment plants (13460)
195. Water pumps (13470)
196. Water treatment (13480)
197. Water wells (13490)
198. Oceans and coastal areas (14000)
199. Marine environments (14100)
200. Algal bloom (14106)
201. Benthic ecosystems (14124)
202. Marine pollution (14142)
203. Marine sediments (14154)
204. Mediterranean ecosystems (14160)
205. Ocean circulation (14166)
206. Ocean currents (14172)
207. Ocean temperature (14178)
208. Red tide (14184)
209. Tides and sea levels (14190)
210. Coastal and island environments (14200)
211. Archipelagoes (14213)
212. Coastal areas (14226)
213. Coastal development (14239)
214. Coastal erosion (14252)
215. Dredging (14265)
216. Estuarine ecosystems (14278)
217. Island ecosystems (14291)
218. Living marine resources (14300)
219. Aquatic mammals (14330)
220. Aquatic microorganisms (14340)
221. Aquatic plants (14345)
222. Coral reefs (14350)
223. Fish (14360)
224. Marine ecosystems (14370)
225. Marine resources conservation (14375)
226. Molluscs and crustaceans (14380)
227. Environment and development (15000)
228. Resources management (15100)
229. Environmental management (15107)
230. Forest management (15114)
231. Forest policy (15121)
232. Land use planning (15128)
233. Land values (15135)
234. National conservation programmes (15142)
235. Nature conservation (15145)
236. Petroleum resources conservation (15149)
237. Renewable resources (15156)
238. Resource appraisal (15163)
239. Resource conservation (15170)
240. Sea bed exploitation (15184)
241. Sea bed mining (15191)
242. Utilization of local resources (15198)
243. Development planning (15200)
244. Cost-benefit analysis (15204)
245. Ecodevelopment (15212)
246. Economic development (15216)
247. Economic planning (15220)
248. Environmental accounting (15224)
249. Environmental auditing (15228)
250. Environmental impact (15232)
251. Environmental impact assessment (15236)
252. Environmental impact statement (15240)
253. Environmental policy (15244)
254. Environmental risk assessment (15248)
255. Financial assistance (15252)
256. Pilot projects (15260)
257. Policy planning (15264)
258. Pressure groups (15266)
259. Regional planning (15268)
260. Self-help programmes (15272)
261. Siting of industry (15276)
262. Social surveys (15278)
263. Status of development (15280)
264. Sustainable development (15284)
265. Transport planning (15288)
266. Human settlements (16000)
267. Human settlements management (16100)
268. Built-up areas (16105)
269. Economic zoning (16110)
270. Fire safety requirements (16115)
271. Historical sites and monuments (16118)
272. Housing improvements (16125)
273. Housing needs (16130)
274. Housing programmes (16135)
275. Housing quality standards (16140)
276. Industrial areas (16145)
277. Off-peak working and travelling (16150)
278. Offices and shops (16155)
279. Patterns of urban growth (16160)
280. Planned urban development (16165)
281. Rehousing (16170)
282. Rental housing (16172)
283. Residential areas (16173)
284. Safety standards for buildings (16175)
285. Standards and codes for building industry (16180)
286. Urban design (16185)
287. Buildings and structures (16200)
288. Bridges (16212)
289. Building materials (16218)
290. Building and construction technology (16224)
291. Construction works (16230)
292. Farm buildings (16242)
293. Government buildings (16248)
294. Highrise buildings (16254)
295. Industrial buildings (16260)
296. Local materials for building (16266)
297. Mobile homes (16272)
298. Nuclear research and power centres (16278)
299. Prefabricated buildings (16284)
300. Thermal insulation (16290)
301. Infrastructure and utilities (16300)
302. Access roads (16305)
303. Aquatic recreational amenities (16315)
304. Automobile parking (16320)
305. Built drainage systems (16325)
306. Electric power distribution (16330)
307. Highways (16335)
308. Open spaces (16340)
309. Pipelines (16345)
310. Playgrounds (16350)
311. Public parks and gardens (16355)
312. Public utilities and services (16360)
313. Road construction and maintenance (16365)
314. Sports facilities (16370)
315. Telecommunications (16375)
316. Transport systems (16380)
317. Tunnels (16385)
318. Urban water supply (16390)
319. Socio-economic aspects of human
320. Birth control (16402)
321. Community and social services (16404)
322. Community participation (16406)
323. Consumption patterns (16408)
324. Development patterns and lifestyles (16410)
325. Disabled persons (16412)
326. Drug abuse and misuse (16416)
327. Family planning (16418)
328. (16420)
329. Homelessness (16422)
330. Housing finance (16424)
331. Human migration (16426)
332. Human population (16428)
333. Human rights (16430)
334. Land allotment (16432)
335. Low-cost housing (16434)
336. Migrant workers (16436)
337. Minorities and race relations (16438)
338. Neighbourhood improvement schemes (16440)
339. New communities (16442)
340. Nomads (16444)
341. Public health and sanitation (16450)
342. Recreation (16454)
343. Rural areas (16462)
344. Social and cultural indicators (16464)
345. Socio-economic factors (16468)
346. Tourism and travel (16470)
347. Under-privileged people (16474)
348. Urban areas (16476)
349. Urban renewal (16480)
350. Urban stress (16482)
351. Women in development (16484)
352. Environmental aspects of human
353. Air conditioning (16510)
354. Disposal of the dead (16520)
355. District heating (16525)
356. Housing density (16530)
357. Overcrowding (16540)
358. Refugees (16550)
359. Tourist facilities (16560)
360. Urban decay (16570)
361. Agriculture (17000)
362. Agricultural practices (17100)
363. Agricultural equipment (17103)
364. Agricultural management (17106)
365. Agricultural methods (17109)
366. Agricultural pests (17112)
367. Agricultural production (17115)
368. Agricultural storage (17118)
369. Animal diseases (17121)
370. Animal nutrition (17124)
371. Apiculture (17127)
372. Aquaculture (17130)
373. Biological control of pests (17133)
374. Composts and natural fertilizers (17136)
375. Contour farming (17139)
376. Controlled burning (17142)
377. Crop protection (17145)
378. Draught animals (17148)
379. Fish culture (17151)
380. Fisheries management (17154)
381. Grains (17157)
382. Infestation of food and crops (17160)
383. Irrigation (17163)
384. Irrigation canals (17166)
385. Irrigation farming (17169)
386. Organic farming (17172)
387. Pest management (17175)
388. Pesticide control standards (17178)
389. Plant diseases (17181)
390. Poultry farming (17184)
391. Shifting cultivation (17187)
392. Tree nurseries (17190)
393. Trickle irrigation (17193)
394. Agro-industry (17200)
395. Animal products (17210)
396. Beverage industry (17220)
397. Brewing and distilling industry (17230)
398. Food irradiation (17240)
399. Food preservation (17250)
400. Food storage (17260)
401. Food transport (17270)
402. Forest products (17280)
403. Tobacco (17290)
404. Agrochemicals (17300)
405. Chemical fertilizers (17308)
406. Fungicides (17316)
407. Herbicides (17324)
408. Metabolism of pesticides (17332)
409. Nitrates, nitrites and nitrosamines (17340)
410. Organophosphorous compounds (17348)
411. Persistance of pesticides (17356)
412. Pesticide pathways (17364)
413. Pesticides (17372)
414. Phosphates (17380)
415. Toxicity of pesticides (17388)
416. Utilization of pesticides (17396)
417. Industry (18000)
418. Industrial processes (18100)
419. Aluminium industry (18103)
420. Appropriate technology (18106)
421. Blast furnaces (18109)
422. Cellulose (18110)
423. Chemical industry (18112)
424. Clean technologies (18115)
425. Clothing industry (18118)
426. Dairy industry (18121)
427. Desalination plants (18124)
428. Iron and steel industry (18127)
429. Laundering and dry cleaning (18130)
430. Leather industry (18133)
431. Metal finishing (18136)
432. Metal plating (18139)
433. Metal smelting (18142)
434. Mineral industry (18145)
435. Mining (18148)
436. Natural gas and oil extraction (18151)
437. Petroleum refining (18154)
438. Printing industry (18157)
439. Pulp and paper industry (18160)
440. Quarrying (18163)
441. Rubber processing (18166)
442. Strip mining (18169)
443. Tar production and use (18172)
444. Wood preservation (18175)
445. Industrial inputs and outputs (18200)
446. Consumer goods (18208)
447. Dangerous goods (18216)
448. Natural fibres (18224)
449. Oil residue recuperation (18232)
450. Packaging (18240)
451. Product labelling (18248)
452. Reusable containers (18256)
453. Synthetic detergents (18264)
454. Synthetic textile fibres (18272)
455. Varnishes and paints (18280)
456. Wood products (18288)
457. Transportation (19000)
458. Air transportation (19100)
459. Air traffic regulations (19140)
460. Aircraft (19160)
461. Aircraft engine emissions (19161)
462. Aircraft noise (19165)
463. Airports (19170)
464. Space transportation (19190)
465. (19199)
466. Land transportation (19200)
467. Bicycles (19209)
468. Combustion engines (19218)
469. Railway transport (19236)
470. Road safety (19245)
471. Road traffic engineering (19254)
472. Road transport (19263)
473. Roads (19272)
474. Urban traffic (19281)
475. Vehicle inspection (19290)
476. Water transportation (19300)
477. Fishing vessels (19310)
478. Inland water transport (19320)
479. Inland waterways (19330)
480. International watercourses (19340)
481. Maritime transport (19350)
482. Navigational hazards (19360)
483. Oil tankers (19370)
484. Ports (19380)
485. Submarines (19390)
486. Energy (20000)
487. Energy sources (20100)
488. Animal dung as fuel (20102)
489. Biogas (20104)
490. Biomass (20106)
491. Biomass energy (20108)
492. Charcoal (20110)
493. Coal (20112)
494. Crude oil (20114)
495. Energy resources (20116)
496. Enriched uranium (20118)
497. Fossil fuels (20120)
498. Fuel alcohol (20122)
499. Fuel wood (20124)
500. Geothermal energy (20128)
501. Hydrocarbon compounds (20130)
502. Hydrocarbons (20132)
503. Hydroelectric power (20134)
504. Liquefied gas (20136)
505. Methane (20138)
506. Natural gas (20140)
507. Non-conventional energy (20142)
508. Non-conventional energy resources (20144)
509. Non-polluting energy sources (20146)
510. Nuclear energy (20148)
511. Nuclear fuels (20150)
512. Oils and petrols (20152)
513. Peat (20154)
514. Refuse derived fuels (20156)
515. Solar energy (20158)
516. Tar sands and oil shales (20160)
517. Thermal sea power (20162)
518. Tidal energy (20164)
519. Uranium (20166)
520. Wave energy (20168)
521. Wind energy (20170)
522. Energy production and use (20200)
523. Coal gasification (20205)
524. Coal liquefaction (20210)
525. Electric power (20215)
526. Electric power plants (20220)
527. Electrical storage devices (20225)
528. Energy conservation (20230)
529. Energy conversion (20235)
530. Energy efficiency (20240)
531. Energy policy (20245)
532. Energy utilization patterns (20250)
533. Gas liquefaction (20255)
534. Lighting (20260)
535. Natural gas and oil exploration (20265)
536. Nuclear energy uses (20270)
537. Offshore nuclear power plants (20275)
538. Offshore oil drilling (20280)
539. Solar heating (20285)
540. Chemistry and biochemical processes (21000)
541. Inorganic substances (21100)
542. Acids (21115)
543. Alumina (21130)
544. Hydrochloric acid and chlorine (21145)
545. Hydrogen sulphide (21160)
546. Sulphates and sulphuric acid (21170)
547. Photochemical agents and effects (21175)
548. Organic substances (21200)
549. Organosilicon compounds (21220)
550. Phenols (21240)
551. Pheromones (21260)
552. Vegetable oils (21280)
553. Biochemical processes (21300)
554. Acidification (21306)
555. Aerobic processes (21312)
556. Anaerobic processes (21318)
557. Biodegradation (21324)
558. Denitrification (21330)
559. Eutrophication (21336)
560. Interaction of pesticides (21342)
561. Ionizing radiation (21348)
562. Metabolism (21354)
563. Nitrogen fixation (21360)
564. Non-ionizing radiation (21366)
565. Photosynthesis (21372)
566. Physico-chemical processes (21378)
567. Radioactivity (21384)
568. Toxicity (21390)
569. Pollution and wastes (22000)
570. Pollutants (22100)
571. Aerosols (22102)
572. Agricultural wastes (22104)
573. Asbestos (22108)
574. Commercial and industrial noise (22110)
575. Crop waste (22112)
576. Dioxins (22114)
577. Farmyard waste (22116)
578. Fire (22118)
579. Hazardous substances (22120)
580. Hazardous wastes (22122)
581. Heavy metals (22124)
582. Hospital wastes (22126)
583. Industrial effluents (22128)
584. Industrial emissions (22130)
585. Industrial fumes (22132)
586. Inorganic pollutants (22134)
587. Lead contamination (22136)
588. Liquid wastes (22138)
589. Litter (22140)
590. Mercury contamination (22142)
591. Micropollutants (22144)
592. Mining wastes (22146)
593. Motor vehicle emissions (22148)
594. Municipal waste (22150)
595. Nitrogen oxides (22152)
596. Noise pollution (22154)
597. Odour nuisance (22156)
598. Organic pollutants (22158)
599. Organic solvents (22160)
600. Organohalogen compounds (22162)
601. Pharmaceutical wastes (22164)
602. Plastic and polymer wastes (22166)
603. Polychlorinated biphenyls (22168)
604. Radioactive substances (22170)
605. Radon (22172)
606. Rubber waste (22174)
607. Sewage (22176)
608. Slaughterhouse waste (22178)
609. Solid wastes (22180)
610. Thermal pollution (22182)
611. Toxic substances (22184)
612. Toxic waste (22186)
613. Toxins (22188)
614. Trace elements (22190)
615. Trace materials and residues (22192)
616. Traffic noise (22194)
617. Trash (22195)
618. Waste heat (22196)
619. Wood waste and sawdust (22197)
620. Pollution sources (22200)
621. Batteries (22208)
622. Cement industry (22216)
623. Chemical and biological weapons (22224)
624. Chimneys, flues and stacks (22232)
625. Cooling waters (22240)
626. Motor vehicles (22248)
627. Motorcycles (22256)
628. Nuclear weapons (22264)
629. Ocean dumping (22272)
630. Oil spillages (22280)
631. Scrap metals (22288)
632. Spoil heaps and excavations (22296)
633. Pollution abatement (22300)
634. Acoustic insulation (22308)
635. Chemical decontamination (22316)
636. Desulphurization of fuels (22324)
637. Noise abatement (22340)
638. Pollution abatement equipment (22356)
639. Pollution control technology (22364)
640. Radiation protection (22372)
641. Scrubbers, separators and filters (22380)
642. Smoke prevention (22388)
643. Waste minimization (22396)
644. Waste disposal and use (22400)
645. Chemical treatment of waste (22408)
646. Disposal sites (22412)
647. Incineration of waste (22416)
648. Mine filling (22420)
649. Radioactive waste management (22424)
650. Recycled materials (22428)
651. Antidumping duties (22430)
652. Recycling (22432)
653. Reuse of materials (22436)
654. Sanitary landfills (22440)
655. Sea outfall (22444)
656. Septic tanks (22448)
657. Sewage disposal (22452)
658. Sewage treatment systems (22456)
659. Solid waste disposal (22460)
660. Waste assimilation capacities (22464)
661. Waste conversion techniques (22468)
662. Waste disposal (22472)
663. Waste disposal in the ground (22476)
664. Waste recovery (22480)
665. Water reuse (22484)
666. Human health (23000)
667. Hazards of pollutants (23100)
668. Accumulation in body tissues (23108)
669. Cadmium contamination (23116)
670. Environmental health hazards (23124)
671. Human exposure to pollutants (23132)
672. Long-term effects of pollutants (23140)
673. Nuclear safety (23148)
674. Pollutant effects (23156)
675. Pollution risk (23164)
676. Radiation effects (23172)
677. Side effects of pharmaceutical drugs (23180)
678. Synergistic effects of toxic substances (23188)
679. Environmentally related diseases (23200)
680. Carcinogens (23208)
681. Chagas' disease (23216)
682. Human diseases (23224)
683. Immunological diseases (23232)
684. Infant mortality (23240)
685. Malaria (23248)
686. Onchocerciasis (23256)
687. Pathogenic organisms (23264)
688. Radiation sickness (23272)
689. Schistosomiasis (23280)
690. Vectors of human disease (23288)
691. Working environment (23300)
692. Ergonomics (23315)
693. Occupational health (23330)
694. Occupational safety (23345)
695. Vibration (23360)
696. Nutrition and health (23400)
697. Allergens (23406)
698. Basic food requirements (23412)
699. Food (23418)
700. Food additives and colourants (23424)
701. Food contamination (23430)
702. Health clinics and hospitals (23436)
703. High protein foods (23442)
704. Malnutrition (23448)
705. Medical treatment and health care (23454)
706. Medicinal plants (23460)
707. Nutritive value of food (23466)
708. Poisons (23472)
709. Smoking (23478)
710. Staple foods (23484)
711. Traditional health care (23490)
712. Disasters (24000)
713. Catastrophic phenomena (24100)
714. Avalanches and landslides (24105)
715. Cyclones (24110)
716. Desert locusts (24115)
717. Earthquakes (24120)
718. Environmental accidents (24125)
719. Epidemics (24130)
720. Floods (24135)
721. Hurricanes (24140)
722. Man-made disasters (24145)
723. Nuclear accidents (24150)
724. Radioactive contamination (24155)
725. Release and spillage (24160)
726. Seismic sea waves (24165)
727. Storm surges (24170)
728. Storms (24175)
729. Tropical storms (24180)
730. Typhoons (24185)
731. Emergency relief measures (24200)
732. Disaster clean-up operations (24208)
733. Disaster preparedness (24216)
734. Disaster prevention (24224)
735. Disaster relief (24232)
736. Displaced persons (24240)
737. Emergency relief (24248)
738. Emergency shelter (24256)
739. Environmental contingency planning (24264)
740. Flood control (24272)
741. Radioactive decontamination (24280)
742. Temporary housing and shelter (24288)
743. Monitoring and environmental data (25000)
744. Pollutant monitoring (25100)
745. Biological indicators (25108)
746. Green labelling (25116)
747. Identification of pollutants (25124)
748. Noise monitoring (25132)
749. Pollutant analysis (25140)
750. Pollutant distribution (25148)
751. Pollutant levels (25156)
752. Pollutant pathways (25164)
753. Pollutant source identification (25172)
754. Pollution monitoring (25180)
755. Radiation monitoring (25188)
756. Traffic monitoring (25196)
757. Monitoring criteria and data (25200)
758. Air quality management (25205)
759. Atmospheric monitoring (25210)
760. Baseline monitoring (25215)
761. Environmental monitoring (25220)
762. Environmental statistics (25225)
763. Forest resource assessment (25230)
764. Freshwater monitoring (25235)
765. Industrial production statistics (25240)
766. Long-term trends and forecasting (25245)
767. Marine monitoring (25250)
768. Pollution criteria (25255)
769. Pollution norms (25260)
770. Quality control (25265)
771. Water quality (25270)
772. Weather monitoring (25275)
773. Weather prediction (25280)
774. Wildlife population statistics (25285)
775. Monitoring techniques and equipment (25300)
776. Analytical equipment (25306)
777. Atmospheric models (25312)
778. Automatic detection (25318)
779. Calibration of measuring equipment (25324)
780. Chromatographic analysis (25330)
781. Gas chromatography (25336)
782. Modelling and simulation (25342)
783. Monitoring equipment (25348)
784. Radioactive tracer techniques (25354)
785. Remote sensing (25360)
786. Sampling techniques (25366)
787. Stream measurement (25372)
788. Toxicological testing (25378)
789. Warning systems (25384)
790. Environmental law and institutions (26000)
791. National legislation and Institutions (26100)
792. Agricultural legislation (26104)
793. Antipollution incentives (26108)
794. Environmental crimes (26112)
795. Environmental law (26116)
796. Environmental liability (26120)
797. Environmental misconduct (26124)
798. Environmental quality standards (26128)
799. Environmental subsidies and incentives (26132)
800. Forestry legislation (26136)
801. Health legislation (26140)
802. Housing legislation (26144)
803. Industrial legislation (26148)
804. Penalties for environmental damage (26152)
805. Polluter-pays principle (26156)
806. Pollution control regulations (26160)
807. Pollution liabilities (26164)
808. Public access to land (26168)
809. Regulatory control (26172)
810. International environmental relations (26200)
811. Access to the sea (26204)
812. Bilateral conventions (26208)
813. Environmental security (26212)
814. Environmental vandalism (26216)
815. Environmental warfare (26220)
816. Export of hazardous wastes (26224)
817. Global conventions (26228)
818. International standardization (26232)
819. International trade (26236)
820. Internationally important ecosystems (26238)
821. Liability for marine accidents (26240)
822. Liability for nuclear damages (26244)
823. Military activity (26248)
824. Prior informed consent (26252)
825. Prior notification for hazardous waste
826. Regional conventions (26260)
827. Technology transfer (26264)
828. Trade barriers (26268)
829. Trans-frontier pollution (26272)
830. Transport of hazardous materials (26276)
831. Environmental awareness (27000)
832. Data processing (27110)
833. Data recording techniques (27120)
834. Environmental education (27130)
835. Environmental training (27140)
836. Geographic information systems (27150)
837. Information technology (27160)
838. Public information (27170)
839. Subject disciplines (28000)
840. Acoustics (28101)
841. Agricultural ecology (28102)
842. Agricultural economics (28103)
843. Agricultural engineering (28104)
844. Agroforestry (28105)
845. Analytical chemistry (28106)
846. Animal ecology (28107)
847. Animal genetics (28108)
848. Animal husbandry (28109)
849. Animal physiology (28110)
850. Architecture (28111)
851. Atmospheric physics (28112)
852. Bacteriology (28113)
853. Biochemistry (28114)
854. Bioclimatology (28115)
855. Biogeochemistry (28116)
856. Biology (28117)
857. Biotechnology (28118)
858. Botany (28119)
859. Cardiology (28120)
860. Cartography (28121)
861. Chemical engineering (28122)
862. Chemical oceanography (28123)
863. Civil engineering (28124)
864. Climatology (28125)
865. Cytology (28126)
866. Electrical engineering (28127)
867. Endocrinology (28128)
868. Epidemiology (28129)
869. Estuarine biology (28130)
870. Estuarine oceanography (28131)
871. Food science and technology (28132)
872. Forestry (28133)
873. Freshwater biology (28134)
874. Genetic engineering (28135)
875. Genetics (28136)
876. Geology (28137)
877. Geomorphology (28138)
878. Geophysics (28139)
879. Geotechnology (28140)
880. Glaciology (28141)
881. Haematology (28142)
882. Horticulture (28143)
883. Human biology (28144)
884. Human physiology and pathology (28145)
885. Hydrography (28146)
886. Hydrology (28147)
887. Hydroponics (28148)
888. Immunology (28149)
889. Inorganic chemistry (28150)
890. Limnology (28151)
891. Marine biology (28152)
892. Marine engineering (28153)
893. Marine geology (28154)
894. Materials science (28155)
895. Mechanical engineering (28156)
896. Meteorology (28157)
897. Microbiology (28158)
898. Microclimatology (28159)
899. Mining engineering (28160)
900. Mining geology (28161)
901. Molecular biology (28162)
902. Oceanography (28163)
903. Organic chemistry (28164)
904. Petroleum geology (28165)
905. Pharmacology (28166)
906. Photogrammetry (28167)
907. Physical oceanography (28168)
908. Plant genetics (28169)
909. Plant physiology (28170)
910. Soil sciences (28171)
911. Spectroscopy (28172)
912. Taxonomy (28173)
913. Toxicology (28174)
914. Veterinary medicine (28175)
915. Virology (28176)
916. Zoology (28177)
917. Organisational attributes (29000)
918. Nature of the source (29100)
919. United Nations (29115)
920. Intergovernmental (29130)
921. Governmental (29145)
922. Industrial or commercial (29160)
923. Non-profit association (29175)
924. Terms of access (29200)
925. Charges negotiable (29215)
926. Cost recovery basis (29230)
927. Fixed schedule of charges (29245)
928. Normally without charge (29260)
929. On exchange basis (29275)
930. Working Languages (29300)
931. Afrikaans (29301)
932. Albanian (29302)
933. Amharic (29303)
934. Arabic (29304)
935. Armenian (29305)
936. Azerbaidzhan (29306)
937. Bengali (29308)
938. Bulgarian (29309)
939. Burmese (29310)
940. Byelorussian (29311)
941. Chinese (29313)
942. Czech (29314)
943. Danish (29315)
944. Dutch (29316)
945. English (29317)
946. Estonian (29319)
947. Finnish (29321)
948. Flemish (29322)
949. French (29323)
950. Gaelic (29324)
951. Georgian (29325)
952. German (29326)
953. Greek (29327)
954. Gujarati (29328)
955. Hebrew (29329)
956. Hindi (29330)
957. Hungarian (29331)
958. Icelandic (29332)
959. Indonesian (29333)
960. Italian (29335)
961. Japanese (29336)
962. Kazakh (29338)
963. Khmer (29339)
964. Kirgiz (29340)
965. Kiswahili (29341)
966. Korean (29342)
967. Lao (29344)
968. Latvian (29346)
969. Lithuanian (29347)
970. Malagasy (29349)
971. Malay (29350)
972. Maltese (29351)
973. Moldavian (29352)
974. Mongolian (29353)
975. Nepali (29354)
976. Norwegian (29355)
977. Panjabi (29356)
978. Persian (29357)
979. Polish (29358)
980. Portuguese (29359)
981. Romanian (29360)
982. Russian (29361)
983. Serbo-Croatian (29362)
984. Sinhalese (29363)
985. Slovak (29364)
986. Somali (29366)
987. Spanish (29367)
988. Swedish (29368)
989. Tadzhik (29369)
990. Tagalog (29370)
991. Thai (29371)
992. Turkhmen (29372)
993. Turkish (29373)
994. Ukranian (29374)
995. Urdu (29375)
996. Uzbek (29376)
997. Vietnamese (29377)
998. Geographic attributes (30000)
999. Global (30010)
1000. Developing countries (30020)
1001. Developed countries (30030)
1002. Africa (30100)
1003. North Africa (30101)
1004. Central Africa (30102)
1005. West Africa (30103)
1006. Southern Africa (30104)
1007. East Africa (30105)
1008. Algeria (30106)
1009. Angola (30107)
1010. Benin (30108)
1011. Botswana (30109)
1012. Burundi (30110)
1013. Burkina Faso (30111)
1014. Cameroon United Republic (30112)
1015. Cape Verde (30113)
1016. Central African Republic (30114)
1017. Chad (30115)
1018. Comoros (30116)
1019. Congo (30117)
1020. C te d'Ivoire (30118)
1021. Djibouti (30119)
1022. Egypt (30120)
1023. Equatorial Guinea (30121)
1024. Ethiopia (30122)
1025. Gabon (30123)
1026. Gambia (30124)
1027. Ghana (30125)
1028. Guinea (30126)
1029. Guinea-Bissau (30127)
1030. Kenya (30128)
1031. Lesotho (30129)
1032. Liberia (30130)
1033. Libyan Arab Jamahiriya (30131)
1034. Madagascar (30132)
1035. Malawi (30133)
1036. Mali (30134)
1037. Mauritania (30135)
1038. Mauritius (30136)
1039. Morocco (30137)
1040. Mozambique (30138)
1041. Namibia (30139)
1042. Niger (30140)
1043. Nigeria (30141)
1044. Rwanda (30143)
1045. Sao Tome and Principe (30145)
1046. Senegal (30146)
1047. Seychelles (30147)
1048. Sierra Leone (30148)
1049. Somalia (30149)
1050. South Africa (30150)
1051. Sudan (30151)
1052. Swaziland (30152)
1053. Togo (30153)
1054. Tunisia (30154)
1055. Uganda (30155)
1056. Tanzania (30156)
1057. Za re (30158)
1058. Zambia (30159)
1059. Zimbabwe (30160)
1060. Americas (30200)
1061. North America (30201)
1062. Central America (30202)
1063. Caribbean Area (30203)
1064. South America (30204)
1065. Antigua (30205)
1066. Argentina (30206)
1067. Bahamas (30207)
1068. Barbados (30208)
1069. Belize (30209)
1070. Bolivia (30211)
1071. Brazil (30212)
1072. Canada (30214)
1073. Chile (30216)
1074. Colombia (30217)
1075. Costa Rica (30218)
1076. Cuba (30219)
1077. Dominica (30220)
1078. Dominican Republic (30221)
1079. Ecuador (30222)
1080. El Salvador (30223)
1081. Grenada (30226)
1082. Guatemala (30228)
1083. Guyana (30229)
1084. Haiti (30230)
1085. Honduras (30231)
1086. Jamaica (30232)
1087. Mexico (30234)
1088. Montserrat (30235)
1089. Nicaragua (30237)
1090. Panama (30238)
1091. Paraguay (30239)
1092. Peru (30240)
1093. St Kitts Nevis (30242)
1094. St Lucia (30243)
1095. St Vincent (30245)
1096. Suriname (30246)
1097. Trinidad and Tobago (30247)
1098. United States (30249)
1099. Uruguay (30251)
1100. Venezuela (30252)
1101. Asia (30300)
1102. Western Asia (30301)
1103. Central Asia (30302)
1104. Southern Asia (30303)
1105. Southeast Asia (30304)
1106. Eastern Asia (30305)
1107. Afghanistan (30306)
1108. Bahrain (30307)
1109. Bangladesh (30308)
1110. Bhutan (30309)
1111. Brunei (30310)
1112. China (30312)
1113. India (30315)
1114. Indonesia (30316)
1115. Iran (30317)
1116. Iraq (30318)
1117. Israel (30319)
1118. Japan (30320)
1119. Jordan (30321)
1120. Cambodia (30322)
1121. Korea, Peoples Democratic Republic of (30323)
1122. Korea, Republic (30324)
1123. Kuwait (30325)
1124. Laos (30326)
1125. Lebanon (30327)
1126. Malaysia (30328)
1127. Maldives (30329)
1128. Mongolia (30330)
1129. Myanmar (30331)
1130. Oman (30332)
1131. Nepal (30333)
1132. Pakistan (30334)
1133. Philippines (30335)
1134. Qatar (30336)
1135. Saudi Arabia (30337)
1136. Sikkim (30338)
1137. Singapore (30339)
1138. Sri Lanka (30340)
1139. Syria (30341)
1140. Thailand (30342)
1141. United Arab Emirates (30343)
1142. Turkey (30344)
1143. Viet Nam (30345)
1144. Yemen (30346)
1145. Europe (30400)
1146. Western Europe (30401)
1147. Eastern Europe (30402)
1148. Mediterranean Area (30403)
1149. Albania (30404)
1150. Andorra (30405)
1151. Austria (30406)
1152. Belgium (30407)
1153. Bulgaria (30408)
1154. Byelorussian SSR (30409)
1155. Cyprus (30410)
1156. Czechoslovakia (30411)
1157. Denmark (30412)
1158. Finland (30414)
1159. France (30415)
1160. Germany (30417)
1161. Greece (30419)
1162. Holy See (30421)
1163. Hungary (30422)
1164. Iceland (30423)
1165. Ireland (30424)
1166. Italy (30425)
1167. Liechtenstein (30426)
1168. Luxembourg (30427)
1169. Malta (30428)
1170. Monaco (30429)
1171. Netherlands (30430)
1172. Norway (30431)
1173. Poland (30432)
1174. Portugal (30433)
1175. Romania (30434)
1176. San Marino (30435)
1177. Spain (30436)
1178. Sweden (30437)
1179. Switzerland (30438)
1180. Ukrainian SSR (30439)
1181. United Kingdom (30440)
1182. USSR (30441)
1183. Yugoslavia (30442)
1184. Oceania (30500)
1185. Australia (30502)
1186. Fiji (30503)
1187. Kiribati (30506)
1188. Nauru (30508)
1189. New Zealand (30510)
1190. Niue (30511)
1191. Papua New Guinea (30513)
1192. Samoa (30516)
1193. Solomon Islands (30517)
1194. Tonga (30519)
1195. Vanuatu (30520)
1196. Oceans and seas (30600)
1197. Antarctic Ocean (30601)
1198. Arctic Ocean (30602)
1199. Indian Ocean (30603)
1200. North Atlantic Ocean (30604)
1201. North Pacific Ocean (30605)
1202. South Atlantic Ocean (30606)
1203. South Pacific Ocean (30607)