Classification
UCA - Environmental problems, man and environment - general aspects
25
UMV - Climatic change
25
UEF - Sustainability
11
UED - Environmental policy
5
AHPC - Ethics
4
GRBA - Climatology - general
3
UHK - Traffic and environment - incl. automobile exhaust gas
3
UPC - Water - general aspects
3
UCE - Environmental impact, environmental pollution
2
UEA - Environmental policy and economy - general aspects
2
UEN - Environmental economy
2
UPK - Water resources, water supply
2
AHP - Philosophy
1
GVA - Oceanography
1
LCK - Ecology - general aspects
1
LWE - Agriculture - general aspects
1
TNT - Management of nuclear materials
1
TNW - Nuclear controversy
1
UCEA - Environmental impact
1
UENP - Population growth and environment
1
UHC - Area planning and environment
1
UKA - Environmental damage and energy production
1
UKB - Environmental effects and energy
1
UPVN - Ocean water, coastal waters
1
USDE - Domestic waste, plastics, paper
1
UXCD - Radioactive emission by nuclear facilities
1
UXPN - Nonproliferation, nuclear weapons
1
UXS - Radioactive waste management
1