For anyone who hasn’t yet heard of these video series –

Greg Craven is a high school teacher from the States who put together six hours of video explaining why we should act on climate change. Don’t be scared by the “six hour” thing – all his arguments are condensed into the first, 10-minute long video.

Still skeptical? Chances are, whatever you’re thinking of is covered in the other five hours and fifty minutes. Check out the rest of the videos here.