global warming & control

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I want to stress that people have gotten an unfortunately weird view of global warming by listening to various people perhaps purposefully confuse the issue. What was really revelatory to me, as one of those people who was by no means an expert -- and I still don't consider myself a scientific expert -- is that we're not talking about a speculative thing. The notion that you put more CO2 up there and you get a warmer world is not debatable at all. This has been understood for a century now. Global warming is real. The only debatable issue is how warm it will get. That's really the only question. And, yes, it's complicated but everything that we've learned has tended to support the conclusion that the effects will be quite significant. What people ought to know is that there's nothing that's been learned that suggests

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Page 1: Global warming & control
Page 2: Global warming & control

History of Earth

• Earth formed ~4.6 billion years ago

• Originally very hot

• Sun’s energy output only 70% of present

• Liquid water present ~4.3 billion years

Page 3: Global warming & control

Earth’s Atmospheric Gases

Nitrogen (N2)

Oxygen (O2)

Water (H2O)

Carbon Dioxide (CO2)

Methane (CH4)

Non-Greenhouse

Gases99%

GreenhouseGases

1%

Page 4: Global warming & control

Global Warming

• Global warming is when the earth heats up (the temperature rises).

• It happens when greenhouse gases (carbon dioxide, water vapor, nitrous oxide, and methane) trap heat and light from the sun in the earth’s atmosphere, which increases the temperature.

Page 5: Global warming & control

Global Warming - Examples

1914 2004

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Greenhouse EffectSun

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• The greenhouse effect is when the temperature goes up, on Earth, since the sun’s heat and light energy is trapped in the earth’s atmosphere.

• While the heat from the sun enters our atmosphere, the heat has trouble leaving back out our atmosphere

Greenhouse Effect

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Page 9: Global warming & control
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Greenhouse Gases

Water

Carbon dioxide Sulfur hexafluorideNitrous oxide

Methane

CO2 | NH4 | N20

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Control on Greenhouse Gases

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Small changes really add up

Replace your old refrigerator with a new Energy Star: Annual savings: $90; 700 pounds CO2

Set your thermostat down a few degrees in the winterAnnual savings: $135; 1400 pounds CO2

Wash clothes in cold water onlyAnnual savings: $70; 500 pounds CO2

Drive JUST 10 fewer miles per weekAnnual savings: $80; 520 pounds CO2

Reduce your garbage by 10% through greater recycling or reduced packagingAnnual savings: 1200 pounds CO2

Replacing just 1 incandescent light bulb with 1 compact florescent bulb saves about 150 pounds of carbon dioxide per year!

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Our take-home message…Save the WORLD its your home

No single technology will stop global warming, but there is a silver bullet: a cap on carbon that will launch all these solutions into the mainstream