1. The Air We Breathe
Chapter 15 Section 4

2. Air Quality Even air that we think is clean isn’t clean
It contains pollutants such as dust, pollen, sea salt, volcanic gas, ash, smoke, swamp gas, and many other material
Natural sources produce a greater amount of pollutants than humans

3. Types of Air Pollution
Air pollutants are described as either primary or secondary pollutants
Primary pollutants are pollutants that are put directly into the air by humans or natural activity
Secondary pollutants are pollutants that form from chemical reactions that occur when primary pollutants come in contact with other primary pollutants or with naturally occurring substances

4. Types of Air Pollution
Ozone is produced when sunlight reacts with automobile exhaust
Ozone reacts with automobile exhaust to form smog

5. Sources of Human-Caused Air Pollution
70% of the carbon monoxide in the United States is produced by fuel-burning vehicles
When fossil fuels are burned, they released oxides of sulfur and nitrogen combine with water in the atmosphere to produce acid precipitation
Some chemicals humans release into the atmosphere react with the ozone and cause holes to open in it
Indoor air pollution can be worst than outdoor due to household products and tightly sealed houses

6. The Air Pollution Problem
Air pollution can cause adverse health effects on human life like, dizziness, itchy eyes, coughing, lung cancer, colds, headaches, runny nose, and sore throat
The clean air act gives the government the authority to control the amount of air pollutants released into the air from most sources
They require factories to install scrubbers in their smoke stacks to filter air pollutants out of the air