310Lspring2009EnvironmentPolicy

310Lspring2009EnvironmentPolicy - Environment: Politics...

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Click to edit Master subtitle style The Climate Change Debate
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“word politics” again “Global warming” “Climate change” “Global weirding” [Lovins]
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Major elements of climate change Global warming Ozone depletion Atmospheric pollution/acid rain
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The residual debate The growing scientific consensus The Bush Administration’s resistance 60 Minutes , March 19, 2006 The current resistance in Congress The Obama administration
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The evidence: Some signs of what’s Carbon dioxide levels rising Mercury climbing Oceans warming Glaciers melting Sea level rising Sea ice thinning Permafrost thawing Wildfires increasing Lakes shrinking (e.g., disappearance of Aral Sea in Asia--see Google Earth) Lakes freeezing up later in the season
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What’s happening (continued) Ice shelves collapsing Droughts lingering Precipitation increasing Mountain streams running dry Winter warmer, spring earlier, autumn later Plants flowering sooner Migration times varying Habitats changing Birds nesting earlier
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What’s happening (concluded) Diseases spreading Coral reefs bleaching Snowpacks declining Exotic species invading Amphibians disappearing Coastlines eroding Cloud forests drying up Temperatures spiking at high latitudes
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The effects of global warming thus far--and the prospects See map, National Geographic , October 2007 For a series of interactive maps, see: http://www.nationalgeographic.com/earthpulse/ind ex.html See Podesta & Ogden, “The Security Implications of Climate Change,” www.americanprogress.org See Lester Brown’s Plan B 3.0 presentation @ http://www.earth-policy.org/Books/PB3/presentation.htm
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The IPCC and other authorities Intergovernmental Panel on Climate Change findings, 1995 on See wikipedia See recent Tom Brokaw documentary “Global Warming: What You Need to Know”: http://dsc.discovery.com/convergence/globalwa See also recent reports in N.Y. Times
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Key questions How serious are the threats? How much is caused by humans?
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310Lspring2009EnvironmentPolicy - Environment: Politics...

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