FOX - Cosmos A Spacetime Odyssey (2014) Part 12 The World Set Free

More than three decades after the debut of Carl Sagan's ground-breaking and iconic series, “Cosmos: A Personal Voyage,” it's time once again to set sail for the stars.

Part 12: The World Set Free

Degrasse discusses our nearest neighboring planet Venus and its climate, and explores the nature of the greenhouse effect (discovered by Joseph Fourier and Svante Arrhenius), and the evidence demonstrating the existence of global warming from humanity's influence.

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