Subtitles NOVA S43E08 – Making North America Part 3 Human

Season 43, Episode 08 – “Making North America Part 3 Human”
From the gold rush to the oil boom, the hidden riches of our landscape have helped Americans prosper. But as our cities grow, so do the risks of catastrophic natural disasters, such as the supervolcano under Yellowstone that could one day obliterate half the continent.