Global Warming is a controversial topic on which many people disagree on the antrhopogenic contributions of carbon dioxide, water vapor, and solar radiance
I do not beleive global warming is man made. The earth, for more cycles than we can count or understand has had my cooling and warming periods in its time. The earth produces itself what the global warming beleivers are trying to get you to beleive are the fault oh humans. We do produce these contributions, not enough to cause a radical change in our envirionment.