Fossil fuels? nuclear? hydroelectric? each has advantages and risks. another. >> our generation's response to this challenge will be judged by history. for if we fail to meet it boldly, swiftly, and together, we risk consigning future generations to an irreversible catastrop catastrophe. >> oil is the fossil fuel that drives the world's economy. oil is black gold, dirty, but precious. the world is hooked. >> you look back at the history of the 20th century, in some ways, it's a history in oil. it's been a driver of geopolitics, it's ban driver of military policy for a lot of countries. and at ...