Classification
UED - Environmental policy
AHA - Research and development, research politics - general
1
AHC - Research and development, research politics - Germany
1
AHE - Research and development, research politics - foreign countries
1
EXA - Energy policy
1
GRB - Climatology
1
UAM - Environmental models
1
UCG - Control of environmental pollution
1
UMV - Climatic change
1