Which of the following does not contribute to increased air quality? a. the clean air act b. hybrid cars c. energy-efficient appliances d. use of cfcs

The correct answer is D. Use of CFCs

CFCs are very dangerous for the environment and destroy the atmosphere which in turn lowers air quality. They are commonly known as Freon due to a brand of CFCs found in fridges.

H=   2(area/a+b)h= 2(144/a+b)h= 2(144/18+18)h= 2(144/36)h= 2(4)h=8