Anthropogenic Global Warming

[Yulegoat]

fooflexible said:

My point is this planet had the ability to change tempetures drastically all on its own. Why are we all the sudden assuming that doesn't happen and its man that's changing everything.

 

Because natural forcings do not explain the observed climatic evolution. Scientists tend to measure these things.

fooflexible said:

Secondly Mars is warming too

Yeah, but according to scientific studies it's because of change in the albedo of Mars.

fooflexible said:

Plus we keep finding out carbon emissions are coming from different sources.

According to a number of isotope analysis, fossil fuels are the most important contributor to the increase of CO2 levels. It's best explained here: http://www.realclimate.org/index.php?p=87

   

fooflexible said:

Fact 1: water vapor is the biggest contributer to global warming. And is the earth's most significant green house gas.

fact 2: man has little to no effect on water vapor. In fact it's been estimated that mans contribution to greenhouse gas is .26% so we've been ignoring the other 99.74%

fact 3:  almost all scientists don't agree on anything.

1. You need to back up the first statement with a source. The increase of water vapour has lead to a forcing of 0.06 W according to Hansen: http://www.realclimate.org/images/forcing_1750-2000-toppanel.jpg Though not increased much, water vapour is the most important greenhouse gas.

2. Where did you get those numbers?

3. What are you implying? That scientists don't know anything for sure?