"Reason"  wrote in
news:cmr1ru$mkp$1{at}darwin.ediacara.org: 

> 
> "Carlos Trevino"  wrote in message 
> news:cmouo7$1ar$1{at}darwin.ediacara.org...
>>
>> Arctic warming more quickly than rest of Earth
>> Associated Press
>>
>> WASHINGTON -- Scientists say changes in the earth's climate from
>> human influences are occurring particularly intensely in the Arctic
>> region, evidenced by widespread melting of glaciers, thinning sea ice
>> and rising permafrost temperatures. 


 
> At risk of heresy, and with due respect to the broad consensus that
> global warming is anthropogenic, it's difficult to account for the
> previous warming cycle a millenium ago, when there was no industrial
> effluent.  The sun has been observed to vary in it's output of
> radiation over time, and corresponds to a good deal of climatic
> warming and cooling. 


Agreed that while there is reasonably good evidence for global warming, 
and there is very good evidence for anthropogenic effects on atmospheric 
chemistry, and there is a plausible model for the connection between the 
anthropogenic effects and the warming, the case for a causal connection 
is far from proven.

Having said that, simply based on the known anthropogenic effects on 
atmospheric chemistry, and since we are still largely ignorant of 
possible interactions between atmospheric chemistry and climate, it is  
difficult to argue for any course other than the "conservative" one - 
which is to do everything possible to limit emissions of carbon dioxide, 
including signing the Kyoto protocol.

Yours,

Bill Morse
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