Just watch the first two minutes and 37 seconds of Leonardo DiCaprio and Fisher StevensBefore The Flood, a climate change and global ruination doc that’s currently streaming on YouTube’s National Geographic channel. It uses Heironymous Bosch‘s The Garden of Earthly Delights to lay out a concise and effective introduction of the basic theme. This plus the handsome high-def resolution makes you want to watch the whole thing. Rotten Tomatoes has given it a 70% score.