Summary:
- Air quality is a measure of the pollutants in the air.
- Poor air quality started to become a serious problem after the Industrial Revolution.
- Vehicles, factories, and power plants still release more than 150 million tons of pollutants into the air each year.
- There are two basic strategies for reducing pollution from fossil fuels: use less fossil fuel, or clean emissions before they enter the air, or buy fewer things that are manufactured using fossil fuels.
- For example, driving a fuel-efficient car lets you go farther on each gallon of gas.