I've been around the world and seen a lot. The sad fact is that humans in general are a stupid, selfish beast. They didn't have the sense to stop breeding when the ecological niche was full enough. They are like birds that foul their own nest to the point of dying from the filth. (Seen in rotted overhangs)
What Ms. Vole says is true, also. Individual action is necessary, in addition to that of governments.
Even a collective worldwide kick in the ass will not overcome human inertia to change.
The too small percentage of us who see it coming and have taken steps to live green, educate and lead others, and try to move the stubborn ass of humanity, just have not had the power and money to do the job.
Ecocidal maniacs as a species, except for a small minority who have one or no children, and live green, on solar or wind, driving a hybrid or electric, composting and growing much of their own food, buying local, reducing, re-using, and recycling, living in eco-homes, and fully understand ecology and the exponential function.
I suppose with selfishness you get the indifference to AGW, but the main thing is people, on average, have too low an IQ to "get it".