Brown, who has positioned California as a global leader in the effort to reduce greenhouse gas emissions, approved the measure as he prepares to host a summit in San Francisco of climate change leaders from around the world later this week. The renewable energy measure would require California's utilities to generate 60 percent of their energy come from wind, solar and other specific renewable sources by 2030. That's 10 percent higher than the current mandate. The goal would then be to use only carbon-free sources to generate electricity by 2045. It's merely a goal, with no mandate or penalty for...
