Air pollution is the contamination of air due to the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials.
air pollution is harmful because if you breathe this bad air in it can kill you or cause major damage to your lungs if you breathe enough in.
what can be done to prevent this
stop driving cars as much
too many powerplants
wild fires
thats just some if we can cut down on those we would have less pollution