World's largest solar power plant, in California
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US presidential campaign: Candidates divided over energy

The question of alternative energy sources has become a major debating point among the candidates vying to become the US's next president.

Following some high-profile industry bankruptcies, the Republican party has attacked President Barack Obama's decision to put billions of dollars of stimulus money into renewable power.

Alastair Leithead reports from the world's largest solar power plant in California.

  • 01 Sep 2012