Classification
UMV - Climatic change
89
GRB - Climatology
20
GRBA - Climatology - general
11
GBC - Paleoclimatology
5
GRA - Meteorology
3
GRBN - Climatological models
3
UMD - Atmospheric models
2
UMN - Air pollution control and measurement
2
YRA - Social studies
2
GPAB - Flora, vegetation - geographical aspects
1
LCM - Terrestrial ecology
1
PLA - Astrosciences - general
1
UCA - Environmental problems, man and environment - general aspects
1
UEA - Environmental policy and economy - general aspects
1
UHP - Protection of nature and landscape
1
UKA - Environmental damage and energy production
1
UMB - Atmospheric chemistry
1
UMNC - Air pollution control by chemical analytical methods
1
UPK - Water resources, water supply
1
YPB - Economy - general aspects
1
YRC - Technology and society
1