I’m on record as having Grist’s David Roberts at the top of my list of people I consider trustworthy about climate change. The things he’s concerned about strike me as things worthy of concern, and his take on those things strikes me as clear-headed and justified.
Recently, he tweeted something to the effect that, “the climate change issue is simple. I could explain it in 15 minutes.” Someone called him on it, and the result is this (okay, 17-minute) TEDx talk:
Sources and additional interesting meta-commentary at Roberts’ blog: Climate change is simple: We do something or we’re screwed.