Gritsmill’s How to Talk to a Climate Skeptichttp://gristmill.grist.org/skeptics#Stages%20of%20Denial
Objection: Despite what the computer models tell us, there is actually no evidence of significant global warming. Answer: Global warming is not an output of computer models; it is a conclusion based on observations of a great many global indicators. By far the most straightforward evidence is the actual surface temperature record. While there are places -- in England, for example -- that have records going back several centuries, the two major global temperature analyses can only go back around 150 years due to their requirement Objection: Global warming is a hoax perpetrated by environmental extremists and liberals who want an excuse for more big government (and/or world government via the U.N.). This is a common line, regardless of how ridiculous it is, so it should not go unanswered. Answer: Here is a list of organizations that accept anthropogenic global warming as real and scientifically well-supported: Objection: Global warming is happening on Mars and Pluto as well. Since there are no SUVs on Mars, CO2 can't be causing global warming. Answer: Warming on another planet would be an interesting coincidence, but it would not necessarily be driven by the same causes.http://gristmill.grist.org/story/2006/11/11/23656/027shapeimage_2_link_0

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