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| | Science and Politics and Global Warming | Peter Demenocal | Orion |
 | | Global warming is of far larger scope than any single administration can address, and effective policy demands a decades-long, committed, political response. |
 | | Cardinal among the climate risks presented, under numerous scenarios, by global warming, is the higher probability of "megadroughts." A megadrought is a very different beast in that it persists for many decades, not just a few years, and affects broad sectors of whole continents. |
 | | Global temperatures have changed for many natural reasons, of course, but when scientists try to account for the full record of global temperature changes over the past several hundred years, it is impossible to obtain a close match to the observed temperature curve without including the effects of very recent increases in greenhouse gas concentrations. |
| www.oriononline.org /pages/om/05-1om/deMenocal.html (3374 words) |
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