Columbia subject headings:
Harvard subject headings:
Air--Pollution
Air--Pollution--Law and legislation
Atmospheric ozone--Reduction--Law and legislation.
Climatic changes
Environmental law, International.
Environmental policy.
Ozone layer depletion--Law and legislation
Ozone layer depletion.
Ozone layer--Law and legislation.
Ozone-depleting substances--Law and legislation.
Princeton subject headings:
Air--Pollution--Law and legislation.
Atmospheric ozone--Reduction--Law and legislation.
Ozone layer depletion--Law and legislation.
Ozone layer--Law and legislation.
Ozone-depleting substances--Law and legislation.