Shot primarily from a helicopter, Petropolis offers an unparalleled view of the world’s largest industrial, capital, and energy project. Canada’s tar sands are an oil reserve the size of England. Extracting the crude oil called bitumen from underneath unspoiled wilderness requires a massive mechanized effort with far-reaching impacts on the land, air, water, and climate. It’s an extraordinary spectacle, one whose scope can only be understood from far above.