Classification
UED - Environmental policy
23
UCA - Environmental problems, man and environment - general aspects
7
UEG - Environmental programs and expertises
7
UEA - Environmental policy and economy - general aspects
5
UMV - Climatic change
5
YEA - Environmental law
5
UHP - Protection of nature and landscape
4
UCN - Environmental education
3
UVC - Environmental chemicals, hazardous materials - general aspects
3
LWE - Agriculture - general aspects
2
UAA - Environment - reference books
2
UCG - Control of environmental pollution
2
UCL - Environmental research
2
UCQ - Environmental technology
2
UEN - Environmental economy
2
UMEE - Clean air planning
2
UPN - Water protection, water quality, clean water
2
USG - Waste treatment, waste disposal
2
UVA - Environmental chemicals, hazardous materials - comprehensive works
2
AEG - Official corporations - Germany
1
AHA - Research and development, research politics - general
1
GXAA - Polar research - arctic region
1
LCN - Ecology - soil sciences
1
LWV - Agriculture - plant protection
1
TKB - Civil engineering - buildings
1
UCE - Environmental impact, environmental pollution
1
UCEB - Environmental pollution
1
UCJ - Environmental protection - general aspects
1
UCS - Environmental chemistry
1
UHC - Area planning and environment
1
UHK - Traffic and environment - incl. automobile exhaust gas
1
UHN - Landscape ecology
1
UKA - Environmental damage and energy production
1
UME - Clean air
1
UMK - Air pollution - general aspects
1
USDE - Domestic waste, plastics, paper
1
USDN - Hazardous waste - incl. waste oil
1
USGK - Waste incineration
1
UUD - Ecotoxicology
1
UXL - Radiation protection - general aspects
1
UXS - Radioactive waste management
1
YED - Law on clean air
1
YMA - International law
1