Thanks for the time for making a thoughtful response. I don't think we disagree on too much here, and I see your point - but the thing to remember is that, for some people in your "life will go on" scenario, life will in fact not go on if the habitats they rely on for survival are destroyed, even if to you and I those ecosystems are merely an enormous benefit, not a necessity. I think that this impact is morally appalling enough to act upon. And finally, my point about climate change being unparalleled in 60 million years was restricted to global warming, you're right that catastrophic events have occurred during this period, but the sort of greenhouse gas induced, rapid global acceleration in temperatures has likely not been seen since the KT event.