Columbia subject headings:
Air--Pollution.
Environmental degradation.
Environmental policy.
Environmental quality.
Nuclear accidents--Environmental aspects.
Pesticides--Environmental aspects.
Water--Pollution.
Harvard subject headings:
Air--Pollution
Environmental degradation
Environmental policy
Environmental quality
Nuclear accidents--Environmental aspects.
Pesticides--Environmental aspects
Water--Pollution
Princeton subject headings:
Air--Pollution.
Environmental degradation.
Environmental health.
Environmental policy.
Environmental quality.
Nuclear accidents--Environmental aspects.
Pesticides--Environmental aspects.
Water--Pollution.