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

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.

The question is " what is a true statement about gustavo? 1. he speaks two languages.2. he is short.3. he takes good notes.4. he plays an instrument.i cannot answer which is correct because i do not know the passage, but i have translated the question and answersee or you.