San Francisco Chronicle: Skeptics believed that the fiscal crisis would force Obama to put his plans to address global warming on the back burner. But in a videotaped speech to a climate summit co-hosted by California Gov. Arnold Schwarzenegger this month, Obama said, “Now is the time to confront this challenge once and for all. Delay is no longer an option.” State officials hope that Obama will reverse a Bush administration decision and approve efforts by California and 16 other states to require automakers …