chapter 7: environmental impacts. lesson 4: impacts on the atmosphere
TRANSCRIPT
Essential Questions
What are some types of air pollution? How are global warming and the carbon
cycle related? How does air pollution affect human
health? What actions help prevent air pollution?
??
Vocabulary
Photochemical smog
Acid precipitation
Particulate matter
Global warming
Greenhouse effect
Air Quality Index
Importance of Clean Air
Your body, and the bodies of other animals, uses oxygen in air to produce some of the energy it needs. Many organisms can survive for only a few minutes without air. But the air you breathe must be clean or it can harm your body
Types or Air Pollution
Smog Photochemical smog is caused when
nitrogen and carbon compounds in the air react in sunlight
Acid precipitation is rain or snow that has a lower pH than that of normal rainwater
Types or Air Pollution
Particulate Matter The mix of both solid and liquid particles in
the air is called particulate matter CFCs Carbon Monoxide
Global Warming and the Carbon Cycle
Global Warming is an increase in Earth’s average surface temperature
Effects of Global Warming The Greenhouse Effect
The greenhouse effect is the natural process that occur when certain gases in the atmosphere absorbs and reradiate thermal energy from the Sun
Health Disorders
Measuring Air Quality The Air Quality Index (AQI) is a scale
that ranks level of ozone and other air pollutants
Positive Actions
National Initiatives In USA, the Clean Air Act sets limits
Cleaner Energy Using renewable energy resources
How can you help? Reducing energy: Turn the thermostat
down, walk to the store or use public transportation, etc.