Columbia subject headings:
Acid rain--Government policy.
Acid rain--International cooperation.
Acid rain--Law and legislation.
Environmental law, International.
Environmental policy--International cooperation.
Harvard subject headings:
Acid rain--Government policy.
Acid rain--Law and legislation
Environmental law, International.
Environmental policy--International cooperation
Princeton subject headings:
Acid rain--International cooperation.
Acid rain--Law and legislation.
Environmental policy--International cooperation.