Is the Global Warming Theory Falsifiable?

One of the marks of science is falsifiability. If a theory cannot be proven false, it is not scientific. It is incumbent upon the advocates of the theory that the earth is warming to define how their theory can be proven false. If it cannot, it is not a scientific theory. I watched the Al Gore video and do not recall him mentioning how his theory could be proven false.

Bob Robbins just forwarded this from the Astute Blogger. The Astute Blogger quotes a number of articles suggesting that this winter is colder than usual in several places, including Wales, India, Sri Lanka and Alaska.

Global warming theorists might reply that the fact that there are swings in temperature is indeed evidence of global warming. If that is so but the swings in temperature fail to reject the null hypothesis of greater variability (this would involve an F test)then the theory of global warming is rejected. Otherwise, I am having trouble understanding how cooler temperatures in various countries can be consistent with "global" warming.

>FUNERAL directors in Swansea have revealed they are holding more services than usual following a rise in deaths.

They say there has been an increase in the death rate and Assembly-based health experts confirmed the freezing temperatures could be responsible.

... Latest provisional figures for winter 2007/08 reveal there were around 1,500 excess deaths in Wales — a seven per cent rise on the previous winter.

>At least 31 people have died in India's northern state of Uttar Pradesh as severe cold weather continues in the region.

>A severe cold wave is hitting the Nuwara Eliya district, thus affecting tea and other plantations in the low lying areas.

>Rapid growth spurt leaves amount of ice at levels seen 29 years ago.

Thanks to a rapid rebound in recent months, global sea ice levels now equal those seen 29 years ago, when the year 1979 also drew to a close.