Classification
UMN - Air pollution control and measurement
280
UMB - Atmospheric chemistry
16
UMK - Air pollution - general aspects
16
UML - Air pollution by special sources
11
UMG - Technology of clean air
10
UHK - Traffic and environment - incl. automobile exhaust gas
9
USGH - Contaminated sites
9
UMNL - Environmental aerosols
8
GRAK - Atmospheric precipitations
7
UMV - Climatic change
7
UPT - Water pollution control and measurement
6
UVR - Environmental aspects of halogens and halogenated hydrocarbons
6
UXN - Radiation protection in nuclear facilities
6
UCG - Control of environmental pollution
5
UKH - Environment and power plants, industrial plants
5
UMLE - Air pollution by power plants and industrial plants
5
UMNC - Air pollution control by chemical analytical methods
5
UMNE - Air pollution by gaseous pollutants
5
CWE - Chemical engineering, chemical industry - general
4
LWV - Agriculture - plant protection
4
UAN - Environment - mathematical methods, computer applications
4
UEG - Environmental programs and expertises
4
UMEE - Clean air planning
4
UMT - Acid rain and atmospheric deposition
4
YED - Law on clean air
4
CLPM - Aerosols - excl. environmental aspects
3
UAX - Environment - information systems, literature guides
3
UCQ - Environmental technology
3
UED - Environmental policy
3
UMC - Atmospheric physics
3
UMD - Atmospheric models
3
UMGD - Clean air technology in fossil fuel and industrial plants
3
UMNG - Air pollution by solid pollutants - incl. smog
3
UMR - Effects of air pollution
3
URA - Soil chemistry
3
USGK - Waste incineration
3
UVFD - Environmental aspects of specific heavy metals - cadmium, lead, mercury
3
UXCD - Radioactive emission by nuclear facilities
3
CT - Chemical methods of materials analysis
2
GRA - Meteorology
2
GXAA - Polar research - arctic region
2
HYE - Environmental health
2
UCE - Environmental impact, environmental pollution
2
UCJ - Environmental protection - general aspects
2
UEN - Environmental economy
2
UMLN - Air pollution by other sources
2
UNA - Noise pollution
2
UPN - Water protection, water quality, clean water
2
USDN - Hazardous waste - incl. waste oil
2
UVH - Environmental aspects of other metals and their compounds
2
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