Which human activity has MOST negatively affected air quality?
A.) burning coal
B.) growing crops
C.) using solar energy cells
D.) constructing nuclear power plants
![Which human activity has MOST negatively affected air quality A burning coal B growing crops C using solar energy cells D constructing nuclear power plants class=](https://us-static.z-dn.net/files/d5e/7875f5f1322a4ef0c224d41d46439efc.png)