>IIRC, The Earth has been cooling for the last few years. Otherwise, it’s not a bad discussion.
The temperature has been pretty constant since 1999. Greenhouse gases will eventually cause warming, but there is also a lot of natural variability.
I think Lomborg has it about right.
Chill Out on Climate Hysteria - The Earth is currently cooling.
“Disconcerting as it may be to true believers in global warming, the average temperature on Earth has remained steady or slowly declined during the past decade, despite the continued increase in the atmospheric concentration of carbon dioxide, and now the global temperature is falling precipitously.” Dr. Phil Chapman wrote in The Australian on April 23. “All those urging action to curb global warming need to take off the blinkers and give some thought to what we should do if we are facing global cooling instead.”
You can find more similar stories under the keyword globalcooling.
Before taking the precautionary principle to the nth degree, I'd like to know if any contributions from anthropogenic sources are significant.