It is only divided down if you choose to divide it down. John McCain, Republican, was quite a proponent of warning about global warming threats until the polls in his home state told him otherwise and his national ambition was thwarted.Quote from ChkitOut:
The fact that the 'global warming' argument is divided down
political lines should tell you its highly suspect.
.. and yes, you can have it both ways, there are peaks and troughs in global temperature, just as there are bubbles and crashes in stock markets around the world. The general trend for both are up in the long term, as they would be in a man made world that is growing.