Another theory:
Solar Activity Most Likely The Principal Driver Of Climate Change
Celestial Climate Driver: A Perspective From Four Billion Years Of The Carbon Cycle
GEOSCIENCE CANADA, March 2005, Volume 32, Number 1 pp.13-30
by Jan Veizer
veizer@science.uottawa.ca.
Ottawa-Carleton Geoscience Centre, University of Ottawa, Ottawa, K1N 6N5 Canada & Institut fuer Geologie, Mineralogie und Geophysik, Ruhr-Universitaet Bochum, Bochum, Germany.
As if to reinforce the concept of natural causes for climate change, an important article was published in GSA TODAY of July 2003 by Dr Jàn Veizer of the University of Ottawa. It deals with cloud formation through charged nuclei provided by cosmic ray flux, which itself is subject to variation in the sun’s magnetic field.
A later article: “
Celestial Climate Driver: A Perspective From Four Billion Years Of The Carbon Cycle” - SOLAR ACTIVITY MOST LIKELY THE PRINCIPAL DRIVER OF CLIMATE CHANGE was published in March 2005 in GEOSCIENCE CANADA.
Point being - there is no consensus that the current warming of temparatures are human caused AT ALL.