LOS ANGELES (Reuters) – A bill that would power up California’s already ambitious effort to shift to cleaner, renewable energy has cleared the state legislature, but it was uncertain if Governor Arnold Schwarzenegger would sign it.

Schwarzenegger, who supports the more aggressive requirements in the measure, is under pressure from interests such as small energy producers and local utility districts to veto the bill.

California lawmakers pass tougher clean energy goals

The plan, passed by the state Senate late on Friday, would require California’s utility companies to get one-third of their electricity from solar, wind and other alternative energy sources by 2020.

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