Jawaban:

1. Air pollution refers to any substance that people introduce into the atmosphere that has damaging effects on living things and the environment.

2. Air pollution is caused by various human activities, including the burning of fossil fuels like gasoline and natural gas, use of chlorofluorocarbons (CFCs) in refrigerants and aerosol propellants, and emissions from livestock and industrial processes.

3. The effects of air pollution include global warming, acid rain, and the deterioration of the ozone layer, among others.

4. People living in a polluted environment can be affected by health problems, such as respiratory diseases.

5. To reduce air pollution, individuals can take steps such as reducing their carbon footprint by driving and flying less and conserving energy. Governments can implement measures such as the Kyoto Protocol and taxing carbon emissions and gasoline to encourage energy conservation and reduce emissions.