Columbia subject headings:
Atmospheric ozone--Reduction--Congresses.
Climatic changes--Congresses.
Global temperature changes--Congresses.
Stratosphere--Congresses.
Ultraviolet radiation--Congresses.
Harvard subject headings:
Climatic changes--Congresses
Global temperature changes--Congresses.
Ozone layer depletion--Congresses.
Ultraviolet radiation--Congresses.
Princeton subject headings:
Atmospheric ozone--Reduction--Congresses.
Climatic changes--Congresses.
Global temperature changes--Congresses.
Stratosphere--Congresses.
Ultraviolet radiation--Congresses.