Mario Molina was a Mexican chemist who was born in 1943 in Mexico City. He discovered that chlorofluorocarbons (CFCs) were depleting the ozone layer. For this breakthrough discovery, Molina received numerous honors including the Presidential Medal of Freedom from President Obama and the Nobel Prize in Chemistry. Molina passed away in 2020 at the age of 70 and is renowned for his visionary work establishing the link between man-made compounds and environmental protection.

1. Mario Molina
Brandon Vindel
English per.2
December 13,2013

2. Assertion
 Mario Molina was a
significant scientist
because he
discovered manmade compounds
affecting Earth’s
upper atmosphere
and on the ozone
layer.

3. Biography
 Mario Molina was born in Mexico City,
Mexico
 He died at age 70
 He was born March 19,1943

4. Evidence # 1
 “Mario Molina won the award ‘Tyler Price
for Environmental Achievement.”

5. Explanation #1
 Most governments are trying to prevent
CFC emissions to save the ozone layer.
Everyone heard about CFCs and their
impact on the ozone layer in 1978 when
M.Molina and S.Rowland published their
findings.

6. Evidence #2
 “On August 8,2013 president Barack
Obama announced Molina as a recipient
of the ‘Presidential Medal of Freedom.”

7. Explanation #2
 Mario Molina is a visionary chemist and
environmental scientist.

8. Evidence #3
 “Mario J. Molina later has won the ‘Nobel
Prize in Chemistry.”

9. Explanation #3
 He discovered how chlorofluorocarbons
deplete the ozone layer.

10. Conclusion
 Mario J. Molina is best known for the
discoveries on man-made compounds
[chlorofluorocarbons] affecting the ozone
layer.
 Mario Molina was a significant scientist
because he discovered man-made
compounds affecting the Earth’s upper
atmosphere and the ozone layer.
 Mario Molina is truly the best chemist.