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harmful materials that enter the enviroment
pollutant
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name three natural sources of air pollution
sand and dust storms, volcanic eruptions, forest fires, and ocean spray
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name three examples of human activities that cause air pollution
dust, ash, soot, pesticides, herbicides, and plant pollen
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released when fossil fuels or organic matter are burned
oxides
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name three sources of indoor pollution
cigarette smoke, micro organisms, and radon
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long term exposure to air pollutants may cause
diseases and chronic health problems
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what heatlh problems does carbon monoxide cause?
high concentrations tress the heart, causes headaches, dizziness, and even death
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what can cause emphysema
ozone and oxides
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what is emphysema
tiny air sacs in the lungs break down
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some particles in the air can cause
cancer
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lung cancer is responsible for more than_________ deaths each year in the U.S.
100,000
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once absorbed, the light energy is changed to_____
heat
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earth radiates the this heat energy back into space in the form of__________
infared radiaton
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how does the earth's atmosphere act like a pane of glass
it allows light energy in, but traps some infared radiation
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earth's greenhouse effect raises the average global tempurature by_____
35 degrees C
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an increase in the earth's average surface tempurature caused by an increase in green house gases
global warming
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name some possible effects of global warming in the future
climate change, polar caps will melt, salt water could enter ground water systems, and weather patterns will change
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what is ozone
a colorless unstable toxic gas with a pungent odor and powerful oxidizing properties
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how is ozone formed
from oxygen by electrical discharge or ultraviolet light
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what does the ozone layer do
absorbs almost all of the UV radiation given off by the sun, preventing it from reaching earth
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what are some effects of the hole in the ozone
sunburn, blindness, skin cancer, and damage to crops
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