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Dr. Mario Jose Molina won the Nobel Prize in Chemistry for his work studying which problem?

a. the ozone layer***
b. deforestation
c. the El Nino effect
d. the greenhouse effect

Answer :

Steffanieee
A.
 He was a co-recipient of the 1995 Nobel Prize in Chemistry for his role in elucidating the threat to the Earth's ozone layer of chlorofluorocarbon gases.
A is correct! 
Hope this helps.

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