Sugar Cane Grows on Oil as $71 Billion Bet Outspends D.C.

BP Plc has invested $7 billion in alternative energy since 2005. Exxon Mobil Corp. is spending $600 million on a 10-year effort to turn algae into oil. And Royal Dutch Shell Plc has been buying up sugar cane mills, plantations and refineries to make ethanol in Brazil.

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