No difference?
Have a look at this: rpc.senate.gov/_files/
022707GlobalWarmingPG.pdf
"This paper is a primer on the science of climate change to help
policymakers
distinguish between the generally known and the uncertain or even
unknown."
...
"Scientific judgements in this area - as in all areas of science 1 -
are tentative and
subject to change."
1Even estimates of physical constants, such as the speed of light,
have undergone
changes. See, Max Henrion and Baruch Fischhoff, "Assessing Uncertainty
in Physical
Constants," American Journal of Physics, 54(9): 791-798, September
1986.
....
"The tropical troposphere, then, can act as
the Earth's exhaust vents for escaping heat allowing the planet to
cool.6
"These findings are still controversial and have been challenged by
other
scientists.7 But these scientific debates illustrate the uncertainties
that still exist in the
science."
6 Roy W. Spencer and William D. Braswell, "How Dry is the Tropical
Free
Troposphere? Implications for Global Warming Theory, Bulletin of the
American
Meteorological Society, 78:1097-1106.
7 See, for example, Dennis L. Hartmann and Marc L. Michelsen, 2002:
"No evidence
for iris," Bulletin of the American Meteorological Society, 83:
249-254, February 2002. For the
response see, Richard S. Lindzen, Ming-Dah Chou, and Arthur Y. Hou,
"Comment on 'No
evidence for iris,'" Bulletin of the American Meteorological Society,
83: 1345-1348, September
2002.
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