Climate change is caused by U.P.P.C.S.(Pre) 2013

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Climate change is caused by

U.P.P.C.S.(Pre) 2013

[GHGs, Climate Law & Ozone Layer, EPA, Kyoto, Montreal Etc]

A

Greenhouse gases

B

Depletion of the ozone layer

C

Pollution

D

All the above

...

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