What are 5 solutions to air pollution?

Five solutions to air pollution:

1. Filters on smokestacks

2. Catalytic converters on car mufflers

3. Convert from coal power to solar power

4. Convert from internal combustion engine powered cars to electric cars

5. Do more walking and bicycling, rather than using powered vehicles.

Also note, although family planning is not specifically about air pollution, it is the larger solution. Uncontrolled population growth leads to every kind of pollution. Eight billion people are likely to produce twice as much pollution as four billion people would.