I feel two things about this. Firstly, there is no doubt that human beings have had a massively detrimental impact on the environment. You don't need to look any further than this:
www.theguardian.com/environment/2014/sep...life-in-40-years-wwf
We think of dinosaurs of being destructive, I bet the fucking T-Rex never managed to destroy 50% of species in 40 years! We've decimated the rainforest, caused massive environmental and air pollution, destroyed animals habitats all over the world, displaced indigenous people, etc.
When do you ever see a politician stand up on a grand stage and campaign against any of that? When was that ever headline news? No, it's just climate change we need to worry about because there's a scientific consensus on the subject. Well, forget about a 'scientific consensus', the decimation of the rainforest has actually happened. We know this because it's not there any more! We know that the Chagos Islanders were driven away from their native land so that a military base could be constructed because there was a massive court case in which the establishment fought their right to return there tooth and nail. We know that animals are dead in massive numbers directly due to human behaviour because this is easily verifiable. When do you ever hear anything about that? When has Obama ever stood up and said "yeah, you know, maybe we should stop completely exploiting the natural world for profit"?
It's bad enough in 'wealthy countries', but in the Third World you just get massive corporations completely destroying people's lives, and they have no power to fight back. I haven't really looked into this in much depth, but I just found
this report which states that the world's top 3,000 firms cause $2.2 trillion of environmental damage EVERY YEAR!
So that's one thing, instantly I'm suspicious of why this is being pushed so hard when other environmental catastrophes are completely ignored. And then I just don't think it's possible for human beings to understand the climate by inputting a load of data into a computer model. If you read how this is done, I don't really consider it to be scientific, it's pseudo-science, in my opinion, so any broad conclusions drawn from it are worthless as far as I'm concerned.