The best method to improve air quality is to a. use technology to reduce the pollutants in air. b. produce less pollution. c. produce less pollution and use technology to reduce the pollutants in air. d. better utilize land and technology to prevent pollution.

A better air quality is that in which the concentration of the pollutants are reduced. The best way to lessen the air pollution is to commit to ways of doing stuffs that harness technology to somehow purify the air before they are given off from a certain process. For this item, my answer is C. 

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The answer is nucleic acid