Answer:
Global warming is mainly caused by non-human activities. The decaying of bio-matter and the heating up of the oceans(which causes them to release CO2) causes over 90% of CO2 emmisions. An estimated 60-90% of "Global Warming" is caused by water vapor, al-most none of which we cause. The math doesn't add up for the Global warming people. It is a farce created to puch the agenda of envirmental groups. They needed something to say "IF you don't stop poluting, ot will hurt you!" So the pushed global warming, a theory with little evidence, back in the early 1990's. The theory will hurt us because enviromental policy meant to deal with global warming will damage the economy. Obama was quoted in the San Fansico Chronicle saying something like "We will take down the coal industry." That would send electricity costs skyrocketing.