Classification
UHC - Area planning and environment
73
UHN - Landscape ecology
10
UHP - Protection of nature and landscape
10
LCK - Ecology - general aspects
4
UHCH - Urban areas
4
UHK - Traffic and environment - incl. automobile exhaust gas
4
GSC - Remote sensing
3
TKB - Civil engineering - buildings
3
UCEA - Environmental impact
3
UED - Environmental policy
3
UKA - Environmental damage and energy production
3
URA - Soil chemistry
3
EUC - Energy conservation - civil engineering
2
GRA - Meteorology
2
GRBK - Climatological data
2
LWO - Agricultural ecology, sustainable agriculture
2
UKE - Environment and energy resources
2
AFK - Research institutions - Germany
1
EUA - Energy conservation - general
1
GBA - General geology, historical geology
1
GCAB - Regional geology - european countries
1
GDAB - Rock mechanics, soil mechanics
1
GNA - Geology - soil sciences
1
GPA - Geobiology - general
1
GSB - Photogrammetry
1
GUAB - Geography - anthropological
1
HAE - Popular medicine
1
LCH - Ecology - methods
1
LCM - Terrestrial ecology
1
LCN - Ecology - soil sciences
1
LCV - Ecology - models
1
LWE - Agriculture - general aspects
1
LWH - Agriculture - soil sciences
1
TKD - Air conditioning, refrigeration
1
UCE - Environmental impact, environmental pollution
1
UCJ - Environmental protection - general aspects
1
UEA - Environmental policy and economy - general aspects
1
UEG - Environmental programs and expertises
1
UHCD - Parks and recreation areas
1
UPK - Water resources, water supply
1
UXNB - Radiation protection relating to reactor safety, reactor accidents
1
YBB - Law - general
1
YEA - Environmental law
1