I think it is pretty clear that our planet is warming due, primarily, to our CO2 emissions. We shouldn't be surprised by graphs like this anymore - we've known this for almost 40 years. In Europe, we have moved past the point of it being contentious or an issue for debate.
The key thing about that graph is it isn't linear. Our CO2 emissions grow, this adds to the CO2 already there since it can have a long lifetime mixed in the atmosphere (up to a century before absorption) so the planet is going to get warmer still.
The issue is how will a continuously warming world affect the kids in our primary schools and their kids. And the problem I have is that some skeptics are applying a risk management strategy of 'Despite the evidence being presented to me, I personally don't think the impact is worth worrying about, so let's do nothing'. Imagine if I applied that to patients in the hospital - I don't accept the blood test results, I personally don't think the child has measles, so let's do nothing'!