Greenwire: California regulators raised the state’s renewable portfolio standard to 33 percent by 2020 in a unanimous vote yesterday that extends the mandate to public power and opens the door to more clean power imported from other states. The California Air Resources Board approved the rule as directed by an executive order that was signed last year by Gov. Arnold Schwarzenegger (R) to increase the RPS from a 20 percent requirement that sunsets at the end of this year. The approach …