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Chapter 5 Air and Water Resources

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1 Chapter 5 Air and Water Resources
Section 1 Air Pollution Notes 5-1

2 What’s in the Air? Nitrogen, Oxygen, Carbon Dioxide, Water Vapor, and other gases All living things depend on these gases Air Pollution: any change to the atmosphere that has harmful effects Pollutants: cause pollution Particles of solids (asbestos) and gases (chlorine fumes) Emissions: particles and gases released into the atmosphere Vehicles, air planes, anything motorized, volcanoes

3 Smog Photochemical smog:
Thick, brownish haze formed when gases in the air react with sunlight Caused by gases emitted by automobiles and trucks Gases formed when gasoline is not completely burned Hydrocarbons: compounds containing hydrogen and carbon Nitrogen oxides: contain nitrogen and oxygen React with sunlight and form ozone Toxic Major chemical in smog

4 Clear Day In Houston Smog Day In Houston

5 Temperature Inversion
Layer of cold air trapped next to the surface by warm air Polluted air is trapped with the cold air Normally warm air is closest to the surface and it gets colder as the distance increases Pollutants are then allowed to escape with the rising warm air

6 Temperature Inversion


8 Effects of Smog Itchy, watery eyes Scratchy throat Lung problems
Harm bodies defense against disease During a smog alert Asthma patients should stay indoors No outside activities for anyone.

9 Acid Rain Precipitation that is more acidic than normal
When coal and oil are burned, they produce nitrogen oxides and sulfur oxides. These form nitric acid and sulfuric acid when mixed with water vapor Can also be snow, sleet, or fog


11 Acid Rain Changes the pH of lakes or ponds Affects plants also
Causes survival rate of fish and turtles to decline Affects plants also Changes the nutrient level in the soil Affects certain types of stone Limestone and marble are eaten away Eats away paint and that causes metal to rust




15 Indoor Air Pollution Air inside can be even worse than outside
Dust, pet hair and air fresheners Asbestos (building material used in old buildings) causes cancer and lung disease Paints and cleaning supplies can give off toxic fumes Smoke from cigarettes or cigars

16 Indoor Air Pollution Carbon Monoxide: (CO)
Colorless, odorless gas that forms when wood, coal, oil or gas is burned Can build up in enclosed areas Must use a carbon monoxide detector to determine if the gas is present

17 Indoor Air Pollution Radon:
Colorless, odorless gas that is radioactive Formed by certain rocks underground and seeps into basements through cracks May cause lung cancer or other health problems if breathed in over many years Good ventilation will prevent the build up of this gas


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