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

The best answer for me from the choices given is option C. The best method to improve air quality is to  produce less pollution and use technology to reduce the pollutants in air. In this way, it will lessen the contribution to air pollution and also prevent air pollution.

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