Or something like that.
Anyhow, some guy who wrote a book called Dying Planet , which I read in college, described the "global warming leads to global cooling" in that fashion (more or less ).
FWIW.
There's also the idea that an increase in temperature leads to increased evaporation from the oceans, which leads to increased cloud cover, which reflects back more of the sun's rays.
I still think some of the increased surface temperatures are caused by many weather stations being located in high pavement, low vegetation areas such as airports, but that's just MY uninformed opinion. ;-)
The reverse would also be true...global cooling (an era we left in the late 19th centruy) would then eventually lead to global warming.
It is possible that the climatic variations are cyclical and that man has simply aggravated the situation which was going to occur anyway.
I agree with the President's position, that more studies and reasearch need to be done, but meanwhile we should have policies and technology which let us adapt if the situation worsens. Outlawing hairspray and automobiles isn't going to reverse a trend which may have been instituted in the 19th century by the heavy use of coal as a fuel.
I still say that politicizing science is a dangerous thing, in that it becomes difficult to determine the correct method of dealing with an actual problem.