New academy chief testifies in Senate
By John Heilprin, Associated Press, July 21, 2005

WASHINGTON -- Global warming is caused primarily by humans and ''nearly
all climate scientists today" agree with that viewpoint, the new head
of the National Academy of Sciences -- a climate scientist himself --
said yesterday.

Ralph Cicerone's views contrasted with the Bush administration's
emphasis on uncertainty about how much carbon dioxide and other
industrial gases warm the atmosphere like a greenhouse.

''Carbon dioxide in the atmosphere is now at its highest level in
400,000 years, and it continues to rise," said Cicerone, who left as
chancellor of the University of California at Irvine to become the
academy president this month. ''Nearly all climate scientists today
believe that much of Earth's current warming has been caused by
increases in the amount of greenhouse gases in the atmosphere, mostly
from the burning of fuels."

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The rest of this story is at:
http://www.boston.com/news/nation/wa...cientist_says/