Air pollution
by Alex I.
1. Causes
1.1. Vehicles smoke
1.2. Wildfires
1.3. Industrial smoke
2. Effects
2.1. Asthma
2.2. Acid rain
2.3. Lung cancer
3. Pollutants
3.1. Outdoor
3.1.1. Carbon Di oxide,Methane,Carbon monoxide
3.2. Indoor
3.2.1. CFC,Dust