Classification
UEND - Environmental costs, environmental investments
24
UEN - Environmental economy
6
UEA - Environmental policy and economy - general aspects
5
UCL - Environmental research
3
UCJ - Environmental protection - general aspects
2
UENG - Cost factors of water pollution and control
2
UENH - Cost factors of air pollution and control
2
UENK - Cost factors of waste management
2
UMV - Climatic change
2
LCK - Ecology - general aspects
1
UAD - Environment - comprehensive works
1
UAN - Environment - mathematical methods, computer applications
1
UCEA - Environmental impact
1
UED - Environmental policy
1
YPG - Business management
1