Ninety-seven percent of climate scientists agree that climate-warming trends over the past century are very likely due to human activities, and most of the leading scientific organizations worldwide have issued public statements endorsing this position.
http://climate.nasa.gov/scientific-consensus/
I hesitate to throw a wrench into this, but since jem never answered my question -- repeated several times -- about what difference it makes, I'll ask again, hoping for an intelligent answer.
I suspected that all of this would come about back when we punched a hole through the ozone layer, and although we did eventually ban CFCs, that's bupkus compared to banning fossil fuels, pesticides, nuclear waste, and whatever else we've been using to poison the air, water, and land. We've shown zero interest in saving ourselves during all this time, much less "saving the planet". But the fact is that the planet couldn't care less about our efforts to save it. What the planet really wants is to rid itself of the pestilence that is us. Once we're gone, it can then go about the business of healing itself. Till then we'll just choke on our own toxins (Christians will wait for the Rapture).
I'm afraid the time during which "urgent action" might actually yield some result is past, which makes the whole jem thing so ludicrous. Sorry to be such a bummer, but those who never leave the city have no idea what's going on out here.