A new energy revolution – similar to shifts from wood to coal to oil – is inevitable as climate change and oil scarcity drive a global search for sustainability in power production. But even the promise of renewable energy holds drawbacks.
"Tonight I want to have an unpleasant talk with you," a somber President Jimmy Carter said gravely into a television camera on an April night in 1977.
A series of oil embargoes and OPEC price hikes had hit the nation hard. Gasoline prices had tripled. Auto-dependent Americans had sometimes waited hours in line to buy the gasoline needed to get to work.
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