Classification
UMV - Climatic change
18
UED - Environmental policy
10
EVB - Energy supply of Germany
5
EBA - Energy production, energy technology
4
UAM - Environmental models
4
UAX - Environment - information systems, literature guides
4
UCJ - Environmental protection - general aspects
4
UKH - Environment and power plants, industrial plants
3
EHA - Renewable energy sources
2
TKF - Power plants
2
U
2
UEDM - Policy of clean air
2
E
1
UVFD - Environmental aspects of specific heavy metals - cadmium, lead, mercury
1