It is hard to comment when you don't even have the clip for us to see, but I always found the argument that "we don't know what will happen, so lets just do nothing!" to be completely asinine.
All I know is this, in a little over 100 years since the industrial revolution began, we have already seen visible signs of environmental destruction and change. A 100 hundred years is a essentially a FART in the vast amount of time that the Earth has been around. And in that FART of time, we have managed to so pollute this planet that due to ozone layer destruction, even FISH are getting SKIN CANCER (http://articles.latimes.com/2012/aug...ancer-20120802). In that FART of time, we have managed to dump so much insoluble plastic into the Ocean that in the Pacific it has even turned into a floating ISLAND of plastic garbage (http://en.wikipedia.org/wiki/Great_P..._Garbage_Patch) TWICE the size of Hawaii.
The fact is, our use of the environment is not sustainable. We take and take, without giving. We don't live off the land like our ancestors did, we rape the **** out of it. The ecosystem is a balancing act. After living outside of that ecosystem for so long (or so we thought), we have lost sight of how we fit in it.
We might have already reached the tipping point and set the world on a trajectory that will leave us without a habitable home, but even if we haven't why wait until we do before changing our ways? Because some Big Oil bigwig is cashing in on our addiction to oil?
This mentality that we shouldn't act because we don't know for sure is an idiot's mentality. It's like saying "I don't know if I will get cancer, so I will just continue to smoke a pack a day". Its ignorance. Feel free to **** over your own health, but don't expect us to sit idly by and let you take us down with you.