"I strongly agree with Vice President Gore that we cannot drill our way to energy independence, but must fast-track investments in renewable sources of energy like solar power, wind power and advanced biofuels..."

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The most interesting biofuel efforts avoid using land that's expensive and has high opportunity costs. They do this by getting onto other types of land, or taking advantage of byproducts that aren't used in the food chain today, or by intercropping.

— Bill Gates