Classification
UEA - Environmental policy and economy - general aspects
5
UHN - Landscape ecology
4
LCK - Ecology - general aspects
3
UEF - Sustainability
3
UEN - Environmental economy
3
UHP - Protection of nature and landscape
3
UEND - Environmental costs, environmental investments
2
USU - Waste recycling
2
GNA - Geology - soil sciences
1
LCO - Hydrobiology
1
UCE - Environmental impact, environmental pollution
1
UCN - Environmental education
1
UCQ - Environmental technology
1
UED - Environmental policy
1
YPF - Labour science
1
YPG - Business management
1
YPM - National economy
1
YRA - Social studies
1