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IntroductionAcid depositionProblemsIndoor air pollutionHealth problemGlobal wormingsolutions

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Industrial smog from burning coal

Photochemical smog from motor vehicleindustrial emissions

Acid deposition from coal burning and motor vehicle exhaust.

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WhatWhat Are the Major Air PollutionAre the Major Air PollutionProblems?Problems?

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Types of Major Air PollutantsTypes of Major Air Pollutants

Carbon oxides (CO)N itrogen oxides and nitric acid (NO, HNO3)S ulfur dioxide and sulfuric acid (SO2,H2SO4)Particulates (SPM )Volatile organic compounds (VOCs)R adioactive radon (Rn)

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S ources and Types of Air Pollutants

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Acid Deposition

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Current and Potential Problems withAcid Deposition

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Important Indoor Air Pollutants

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Human Respiratory SystemHumanRespiratory System

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Human R espiratory S ystem

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Healthy and Diseased Lungs

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H ow Might the Earth s Temperatureand Climate Change in the Future?

Evidence indicates that the earth satmosphere is warming, mostly because of human activities.

It will lead to significant climatechange during this century.

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N atural greenhouse gasesWater vapor (H 2O)Carbon dioxide (CO 2)Methane (CH 4)N itrous Oxide ( N 2O)

Enhanced greenhouse, effect Globalwarming

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1. 13 warmest years on record since1990

2. Arctic temperatures have risentwice as fast

3. Changes in glaciers, rainfall patterns, hurricanes

4. Sea level rise in this century 4 8inches

5. Drought 6. Decreased food production7. Threat to biodiversity 8. Threats to human health

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Melting of Alaska s Muir Glacier

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S olutionG overnments can tax greenhouse gas

emissions, subsidize energy efficiency

and renewable energy use, and cooperate internationally, and individuals and institutions can sharply reduce their greenhouse gas emissions.

We can slow the rate of climatechange by increasing energy efficiency,relying more on renewable energy resources, and reducing greenhouse gasemissions.

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CO2 is pumpeddown from rig fordisposal in deepocean or underseafloor sediments

Deep, saltwater-filled cavern

Spent coalbed cavern

CO2 is pumpedunderground

S pent oil or

natural gasreservoir

Crop fieldSwitchgrass

Abandoned

oil field

Tree plantationCoal powerplant

Tanker delivers

CO2 from plantto rigOil rig

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R emoving Carbon Dioxide from the Atmosphere

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Preparing for Climate Changes

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