I think it's wise to take in some of the wider issues around global warming, which I'll detail below. Context is part of any debated issue, I think, and while debating points tend toward the narrowing of focus, as they should, I've found it often quite pertinent to let the focus widen and to take in some "stray" "neighbourhood" information in the vicinity of any given question.
As for the global warming issue, I notice that there is the aboriginal take on things. It's hard to not be impressed by the famous statement of Chief Seattle (very short, really) in which you find the quote about "you can't eat money." Given that there were from 50 to 80 million inhabitants of Turtle Island, or the New World, at the time of "discovery" by the Italian working for the Spanish crown, and that in a number that large, the very top of the mental elite of the about-to-be genocided had to be geniuses, their perspective on the care of nature should be taken in.
My first thought about the natives is to discount their views, because they just didn't have nature-restricting, nature-confonting, nature-controverting means. Europeans didn't either, at first, but they carried the seeds of today's technology within their culture, and so are more important in looking at the global warming situation. And it seems that some first-nation speakers are trading on the basis of their presumed racial innocence, so far as the ecology is concerned.
But, the idea that humanity may have overlooked something extremely valuable that nature offers us, that idea I have to accept. If we really saw, as if for the first time, the shocking beauty of our world, would we not be more cautious in all our endeavours? What size is our Earth? It depends - we've all looked out across the ocean or prairies, and felt the generosity of living space we inhabit - a world so large that its basic spherical shape is not discernable at all in such wide open spaces. Then, have you seen the photograph of the tiny blueish dot in the vast sea of darkness, of the same Earth, taken by one of our departing exploratory rockets in recent years?
The men who rush to war and getting and maintaining the power to start a war at any time, any place, or to exploit any resource without the slightest caution in mind, or concern for the stability of the tiny blue dot - I feel about as far from these "aliens" (alien to my consciousness, that is) as that departing rocket must have been from its place of origin.