Air Pollution (all environmental problems involve the air) Primary air pollutants: released directly from a source into the atmosphere -natural sources: dust, wildfires, volcanoes -manmade sources: primarily burning of fossil fuels, burning of biofuels -may be stationary or moving
{"Image DocumentName": "Atmospheric pressure (millibars)", "Image ImageDescription": "Temperature. Pressure. Thermosphere. Mesopause. Heating via ozone. Mesosphere. Altitude (kilometers) Stratopause. Altitude (miles) Stratosphere. Figure Natural capital: the earth\u2019s atmosphere is a dynamic system that consists of four layers. The average temperature of the atmosphere varies with altitude (red line). Most UV radiation from the sun is absorbed by ozone (O3), found primarily in the stratosphere in the ozone layer 17\u201326 kilometers (10\u201316 miles) above sea level. QUESTION: How did living organisms lead to the formation of the ozone layer? Tropopause. Ozone layer Heating from the earth. Troposphere. Pressure = 1,000 millibars at ground level. (Sea level) Temperature (\u02daC) Fig. 19-2, p. 440.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}