Classification
UMV - Climatic change
23
GRB - Climatology
5
GRBA - Climatology - general
3
UED - Environmental policy
2
GPAB - Flora, vegetation - geographical aspects
1
LWE - Agriculture - general aspects
1
LWO - Agricultural ecology, sustainable agriculture
1
UEDM - Policy of clean air
1
UMA - Atmospheric sciences
1
UMNE - Air pollution by gaseous pollutants
1