Question - Which of the following human activities reduces the level of ozone in the atmosphere?

Which of the following human activities reduces the level of ozone in the atmosphere? 

A) using artificial lighting in scientific polar stations 

B) using large banks of solar cells for energy production 

C) releasing chlorofluorocarbons from aerosol cans 

D) destroying large areas of the equatorial rain forests

ANSWER:

C) releasing chlorofluorocarbons from aerosol cans