Classification
UMV - Climatic change
50
UCA - Environmental problems, man and environment - general aspects
17
UED - Environmental policy
13
UMB - Atmospheric chemistry
13
UEG - Environmental programs and expertises
11
GRB - Climatology
8
LCK - Ecology - general aspects
5
UAA - Environment - reference books
5
UCE - Environmental impact, environmental pollution
5
GMAD - Organic geochemistry
4
LCM - Terrestrial ecology
4
UCL - Environmental research
4
AFA - Research institutions, scientific organizations - international and supranational
3
GSC - Remote sensing
3
LER - Plant physiology - ecological aspects
3
LWE - Agriculture - general aspects
3
UHN - Landscape ecology
3
UMA - Atmospheric sciences
3
UMRC - Effects of air pollution on plants and animals
3
GBA - General geology, historical geology
2
GBC - Paleoclimatology
2
GRBA - Climatology - general
2
LCL - Biotopes, ecosystems
2
UAM - Environmental models
2
UEA - Environmental policy and economy - general aspects
2
YRC - Technology and society
2
AHP - Philosophy
1
GKA - Geophysics - general
1
GPA - Geobiology - general
1
GRAD - Earth atmosphere, weather
1
GRAK - Atmospheric precipitations
1
GRBN - Climatological models
1
GUA - Geography - general
1
GUAB - Geography - anthropological
1
GXAA - Polar research - arctic region
1
LCD - Ecology - comprensive works
1
LCV - Ecology - models
1
LHL - Microbiology - general aspects
1
LWH - Agriculture - soil sciences
1
PLA - Astrosciences - general
1
UAN - Environment - mathematical methods, computer applications
1
UAX - Environment - information systems, literature guides
1
UCG - Control of environmental pollution
1
UCS - Environmental chemistry
1
UENP - Population growth and environment
1
UHC - Area planning and environment
1
UHK - Traffic and environment - incl. automobile exhaust gas
1
UMC - Atmospheric physics
1
UMD - Atmospheric models
1
UMK - Air pollution - general aspects
1
more ...