Warming and cooling are natural cycles; claims of unusual warming are a hoax or conspiracy


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Warming and cooling are natural cycles; claims of unusual warming are a hoax or conspiracy.

  • Warming and cooling are natural cycles; claims of unusual warming are a hoax or conspiracy.

  • If there is unusual warming, there’s no evidence it’s human-caused; there’s controversy

  • So what if there is unusual warming, weather variations are greater. And warming could be a good thing.

  • Why get involved? There’s nothing we can do about it. Besides, economic forces led by the renewables revolution will take care of the problem.



Basics of global warming and the greenhouse effect have been known for over 100 years.

  • Basics of global warming and the greenhouse effect have been known for over 100 years.

  • CO2, the major greenhouse gas, is building up in the atmosphere.

  • The buildup is human-caused.

  • The planet is heating up.

  • The heating will continue. There’s no scientific controversy.

  • Some predicted regional impacts are apparent; there could be dire and potentially irreversible impacts.

  • There’s still time to prevent the worst, but we can’t count on a “renewables revolution.” We need to put a price on carbon.



1. Basics of global warming and the greenhouse effect have been known for over 100 years

  • 1. Basics of global warming and the greenhouse effect have been known for over 100 years





















Carbon dioxide (CO2) isotope ratio shows the increase is from combustion

  • Carbon dioxide (CO2) isotope ratio shows the increase is from combustion

  • CO2 increase is consistent with well-characterized amount of fossil fuels combusted















































  • Natural influences alone can’t explain the rise

  • Models explain the rise well when human and natural influences are included

  • These same models predict that it will get much warmer



















More extreme weather

  • More extreme weather

    • Very hot episodes
    • Droughts
    • Heavy rain and floods
    • Possibly more intense storms
  • Ecological effects; plants, oceans

  • Coastal erosion











































Admit there’s a problem

  • Admit there’s a problem

  • Develop strategies to adapt

  • Keep the heating from being worse by reducing our emissions of GHGs

    • At the local and personal scale, for example by cutting energy use, eating less meat
    • At a large scale – by supporting effective policies and actions






















More economically efficient

  • More economically efficient

  • Less interference with other programs

  • Easier to administer

  • Will encourage innovation across all sectors

  • More amenable to international coordination

  • Could be revenue-neutral; not really a “tax”







Basics of global warming and the greenhouse effect have been known for over 100 years.

  • Basics of global warming and the greenhouse effect have been known for over 100 years.

  • CO2, the major greenhouse gas, is building up in the atmosphere.

  • The buildup is human-caused.

  • Our planet is heating up.

  • The heating will continue.

  • Some predicted regional impacts are apparent; there could be dire and potentially irreversible impacts.

  • There’s still time to prevent the worst, but we can’t count on a “renewables revolution.” We need to put a price on carbon.



http://ipcc.ch/

  • http://ipcc.ch/

  • http://www.realclimate.org/

  • http://www.skepticalscience.com/

  • http://citizensclimatelobby.org/

  • http://www.carbontax.org/

  • http://pandoraspromise.com/





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