Components of Air & Human Impact SVN 3E
Our Air: Nitrogen (N 2 ) Oxygen (O 2 ) Water vapour (H 2 O) Trace Gases: –Carbon dioxide (CO 2 ) –Methane (CH 4 ) –Nitrous oxide (N 2 O) –Carbon monoxide (CO) –Ozone (O 3 ) –Sulphur dioxide (SO 2 ) 78.1%20.9%0–4%0.04%0.036%0.0002% % % % % Now, let’s make a Pie Graph!
Our Air: Nitrogen: useless as N 2 in the air, but valuable nutrient in the soil Oxygen: used for cellular respiration (to burn fuel for energy) Water Vapour: humidity – forms clouds and precipitation Trace Gases: some are associated with pollution!
Human Impact on Our Air: BRAINSTORM! –What human activities impact our air??? SOURCES OF POLLUTION: –Burning of Fossil Fuels –Industry –Transportation (cars, trucks, planes, etc.) –Energy Production –Heating, etc.
Human Impact on Our Air: Some Impacts / Issues: –Increase CO 2, H 2 O, NH 4 = global warming –Increase SO 2 & O 3 = smog –Increase SO 2 & N 2 O = acid precipitation –Increase in air pollutants affect human health, harm ecosystems, result in extinctions, etc.!!!