130 likes | 571 Vues
Solutions to Air Pollution. - motor vehicle use and manufacturing grew. 1. 1900-1970. - air in cities became more polluted. - nitrogen oxide increased 1000%. Air Pollution Control Act of 1955 Clean Air Act of 1963 Clean Air Act of 1970 Clean Air Act of 1990. 2. Air Pollution Laws.
E N D
- motor vehicle use and manufacturing grew 1. 1900-1970 - air in cities became more polluted - nitrogen oxide increased 1000% • Air Pollution Control Act of 1955 • Clean Air Act of 1963 • Clean Air Act of 1970 • Clean Air Act of 1990 2. Air Pollution Laws
3. U.S. Environmental Protection Agency • Gathers and analyzes air pollution data from across the U.S. - works to keep country’s air clean
Federal law that regulates air pollution in U.S. 4. Clean Air Act - each state limits what power plants and industries can release - companies that exceed the limit must pay a fine - auto exhaust is monitored in areas with poor air quality
5. ambient air • the surrounding air you breathe - scientists take samples and test for particulate matter, carbon monoxide, sulfur dioxide, nitrogen dioxide, lead, and ozone
6. Air Quality Standard - the level which pollutants cannot go past - national parks have stricter standards than cities
- pollutants released into the air from a particular source 7. Emissions - measured at industry smokestacks and automobile tailpipes use devices that capture pollutants already created limit the amount of pollutants produced 8. Controlling Emissions
9. Emission Control Devices - catalytic converter- put on cars, changes harmful gases in car exhaust to less harmful ones - smokestack scrubbers- put on smokestacks at coal-burning plants to stop some sulfur dioxide - electrostatic precipitator- clean the smoke by removing up to 99% of particulate matter from industrial emmissions
10. You can help! - reduce the amount of electricity you use - turn down heat in winter and open windows in the summer - use public transportation, ride a bike, or car pool
11. Today’s Air Quality - air quality is improving - smog is increasing in rural areas - 2,500 bodies of water with fish unsafe to eat