Global Warming And the U.S.. What is Global Warming? *An increase in the average temperature of the Earth *Recent debate, but has been looked at by scientists.

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Presentation transcript:

Global Warming And the U.S.

What is Global Warming? *An increase in the average temperature of the Earth *Recent debate, but has been looked at by scientists for centuries

What causes it? *CO2 *methane *nitrous oxide *fluorinated compounds Greenhouse Gases: Human Impacts-

What causes it?  Natural Impacts: *Volcanoes *Water vapor *clouds *Change in sun’s energy output

Who ’ s Responsible?  Burning of fossil fuels is main cause U.S. is leader in greenhouse gasses Human impacts are changing the composition of the atmosphere

What are Causes of Global Warming? Air Pollution What is air pollution? -The presence in the air of substances which pose a potential threat to human health and/or the environment. -The presence of particles in the air which decrease visibility -The U.S. EPA estimates that 50 percent of the U.S. population is exposed to air pollutants exceeding current federal standards.

Sources and Types of Air Pollution Energy production from fossil fuels -Carbon dioxide, sulfur oxides, particulates -Increase in greenhouse gases, acidic precipitation

Sources and Types of Air Pollution Automobiles, other transportation sources -Carbon dioxide, nitrogen and sulfur oxides, products of incomplete combustion -Increase in greenhouse gases, acidic precipitation

Sources and Types of Air Pollution Refrigeration devices including home, commercial, and vehicles -Chlorofluorocarbons -Destruction of the stratospheric ozone layer

The Carbon Cycle

Effects of Air Pollution and Global Warming - Rising Sea Level -Change of precipitation and local climate conditions; acid rain -Alteration of forests and crop yields - Expansions of deserts into existing rangelands - More intense rainstorms -Not all long-term effects can be determined

What Is Being Done: Alternatives ages/solar_array_southfield.jpg atree/wind-generators.1.jpg Renewable Energy Sources Solar Energies Wind Power ass.jpg Biomass rmal.gif Geothermal

Changes In Vehicle Systems Hybrid Fuel Cell Battery- Electric e/tech_pic_eng_prius.jpg ages/merlin.jpg stdrives/carpicts/ecom_sm.jpg

Are These Feasible? © 2002 Organization of the Petroleum Exporting Countries (p296)

Comparative Costs of Renewable Energy Technologies

Conclusion  Responsibility to improve environmental conditions lies upon all of us as individuals  Concentrate on preventing environmental degradation before it starts  Alternatives ARE feasible and Can be Used