• 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.
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