Classification
UEA - Environmental policy and economy - general aspects
140
UED - Environmental policy
19
UCA - Environmental problems, man and environment - general aspects
11
UEF - Sustainability
8
YPB - Economy - general aspects
7
UMV - Climatic change
6
LCK - Ecology - general aspects
5
UEN - Environmental economy
5
UEND - Environmental costs, environmental investments
5
YBB - Law - general
4
YZA - Politics, political science
3
UAM - Environmental models
2
UCE - Environmental impact, environmental pollution
2
UCJ - Environmental protection - general aspects
2
UHP - Protection of nature and landscape
2
UKA - Environmental damage and energy production
2
YPM - National economy
2
AHA - Research and development, research politics - general
1
AHP - Philosophy
1
ECA - Energy resources
1
EHA - Renewable energy sources
1
EIP - Photovoltaics
1
EWA - Energy economy
1
EXA - Energy policy
1
GBA - General geology, historical geology
1
GNA - Geology - soil sciences
1
GRB - Climatology
1
GTA - Hydrology - general
1
GWA - Raw material economy, raw material policy
1
LTX - Bioeconomy
1
LWF - Agriculture - methods
1
LWO - Agricultural ecology, sustainable agriculture
1
MWE - Decision theory, game theory
1
UAA - Environment - reference books
1
UAN - Environment - mathematical methods, computer applications
1
UCN - Environmental education
1
UCQ - Environmental technology
1
UEDK - Policy of radioactive waste
1
UENH - Cost factors of air pollution and control
1
UENP - Population growth and environment
1
UHC - Area planning and environment
1
UKH - Environment and power plants, industrial plants
1
UMK - Air pollution - general aspects
1
UPC - Water - general aspects
1
UPK - Water resources, water supply
1
UPVF - Surface waters - streams, rivers, lakes
1
USU - Waste recycling
1
UVC - Environmental chemicals, hazardous materials - general aspects
1
YPO - Economic policy
1
YPS - Economy of the developing countries
1
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