[hzzn]

A quote from

http://www.uwgb.edu/dutchs/PSEUDOSC/GlobWarm.HTM

    The science, reduced to its simplest terms, is that carbon dioxide
    is known to be effective at trapping solar heat. So are water
    vapor (the source of 90% of earth's natural greenhouse effect),
    methane, and other gases. The natural carbon dioxide content of the
    atmosphere has doubled in the last 200 years, climate is getting
    warmer, so the logical conclusion is that there is a connection
    between the two trends. If you feel uncomfortably warm at night and
    wake up to find someone has put another blanket over you, you don't
    need to look beyond that to identify the source of the warming.

    * Nobody - nobody - argues with the carbon dioxide trend. It's
    established beyond doubt.

    * The debate over whether climate is getting warmer is mostly over.

    * The debate now is over whether the connection between warming and
    human emission of carbon dioxide is real, or whether there are other
    causes of climate change at work.

    * The real issue is whether the benefits of taking action will
    outweigh the costs and regulatory burdens.

    * There are some who argue that warming will be beneficial by
    reducing energy demands for heating, lengthening growing seasons,
    and creating larger habitable and arable territory.

    The case for human-caused global warming is simultaneously a lot
    clearer than George W. Bush believes, and a whole lot less so than
    Al Gore does. There are legitimate questions about the data, past
    climate reconstructions, and the computer modeling still to be
    answered.