> The science behind it seems complex and because it relies so heavily on modeling The thing is that you don't require complex modeling to get global warming.

> The science behind it seems complex and because it relies so heavily on modeling The thing is that you don't require complex modeling to get global warming. Energy comes to the earth from the sun. Energy's radiated out to space as infrared. Carbon dioxide blocks infrared and so increases the temperature. As with everything, you can construct more accurate and more complicated models, but it's a myth that global warming only shows up as a consequence of the complexity. People had to start studying climate change for some reason, right? They did back of the envelope calculations first and then brought in the complicated models to try to quantify exactly the amount of climate change and what its effects would be. Don't get me wrong, climate change has two big things working against it: the effects will not be observed directly for decades, and there's a lot of money from oil and gas which is fighting any attempts to take action. The former means that the evidence is based on modeling and the latter does everything it can to cast doubt on the models.