Chapter 1 THE ATMOSPHERE WEATHER AND CLIMATE Chapter 1 THE ATMOSPHERE

Section 4 The Air We Breathe

pollutants that are put directly into the air by human OR natural activity primary pollutants

primary pollutants not produced by humans such as dust, sea salt, volcanic gases and ash, pollen, and swamp gas natural pollutants

pollutants that form from chemical reactions that occur when primary pollutants come in contact with each other or with naturally occurring substances such as water vapor or sunlight secondary pollutants

Automobile exhaust reacts with air and sunlight to cause _______ and ______. smog ozone

Ozone and smog are examples of _________ pollutants. secondary

main source of human-caused pollution transportation

air pollution caused when factories or power plants burn fossil fuels industrial air pollution

polluted air inside a building caused by compounds found in household cleaners, materials and cooking smoke that can be worse than outdoor pollution indoor air pollution

Pollution can be moved from one place to another by ______. winds

precipitation that can kill living things because it contains acids from air pollution acid precipitation

Click on the picture to read “The Tale of Lucy Lake.”

Click on this link and watch an animation on Acid Precipitation and then do a word search or crossword puzzle

The ozone hole continues to grow and as a result allows more ____________ rays to reach the Earth’s surface. ultraviolet

Comparison of Ozone Hole by Year

Daily exposure to small amounts of air pollution can cause serious ______ problems. health

EPA stands for ____________ __________ ___________. Environmental Protection Agency

law signed in 1970 that gives the EPA the authority to check air quality and control standards Clean Air Act

How well has the Clean Air Act worked? Emissions of toxic lead have dropped 98 percent. Emissions of sulfur dioxide have dropped by 35 percent and emissions of carbon monoxide have dropped by 32 percent. cleanairtrust.org

Air Quality Index Information and Games Find your local air quality forecast!

Fun and Games Information, Games, and Links on Climate Change Read a comic strip on a serious matter! Play Smog City or Smog City 2. Vocabulary Games