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Air Pollution.

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Presentation on theme: "Air Pollution."— Presentation transcript:

1 Air Pollution

2 The most dangerous city in the world for children due to polluted air…
Mexico City

3 Clean Air Nitrogen gas (78%) and Oxygen gas (21%) Argon Carbon Dioxide
Water Vapor

4 Polluted Air Harmful substances that build up in air
Substances include: solids, liquids, gases

5 Air Pollution Human Activities: burning fossil fuels

6 Natural Air Pollution Volcanoes (ash and sulfur dioxide) Dust Pollen
Spores

7 Primary Pollutants Put directly into the air by humans TRANSPORTATION
DEMOLITION INDUSTRY EXHAUST BURNING

8 Carbon Monoxide (CO) Odorless, colorless, poisonous gas
Burning…cars, furnace Drowsiness and death

9 Secondary Pollutants Chemical reactions between primary pollutants and water vapor SMOG ACID RAIN

10 Nitrogen Oxide Gas with brownish haze
Burning…cars, power plants, boilers Lung cancer, acid rain, respiratory probs

11 Sulfur Dioxide Gas (smells like rotten eggs)
Burning…coal, power plants Acid Rain Harms plants/fish Respiratory probs Corrosive

12 World Air Quality Problems
As countries become more developed they are more likely to use fossil fuels Most air pollution comes from cars and industry Motor Vehicle Emissions: About one/third of all air pollution comes from burning GAS The Clean Air Act (1970) required: catalytic converters, unleaded gas, improved mpg

13 Industrial Air Pollution
Industries and power plants: burn fuel for energy Huge quantities of sulfur dioxide (coal) and nitrogen oxide (oil/gas) are released into the air Other industries produce VOC’s that form toxic fumes Dry cleaning, oil refineries, manufacturing, furniture refinisher, auto repair shop, aerosols

14 SMOG In many urban areas, air pollution gets trapped in cities and appears as a gray haze that reduces visibility. Made of sun, air, exhaust, and ozone Worst places for smog: LA Denver Phoenix

15 Temperature Inversion
Diagram:


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