http://www.jeremyrhammond.com/wp-content/uploads/2016/03/mau...
It is simple physics as to how CO2 works as a greenhouse gas. Seeing the clear trend of increasing CO2 in the atmosphere makes warming sort of obvious (at least to me). All of the complex second order effects (how much warming, how climate and weather patterns will react, and so on) are much more complicated and therefore less clear. Nevertheless, we are having a strong clear effect on the atmosphere which is going to warm the planet. The rest is details (though those details are getting a lot scarier, recently).
I don't know that we know, precisely, how fucked we are yet, but I do think it's clear that humans are having an effect, and we know very convincing reasons for why we're having an effect, so we should work to reduce that effect regardless of whether we're fucked in 100 years if we continue this way, or if it will take 1000.
> SHAKUN ET.AL. (2012), MARCOTT ET.AL.(2013), ANNAN AND HARGRAVES (2013), HADCRUT4, IPCC
But how are we to make money then?! Do you want Elon Musk to keep all off it for himself? Why do you hate America?
This xkcd changed my mind: https://xkcd.com/1732/