SACRAMENTO If California becomes the first state to cap greenhouse gas emissions from industry, Gov. Arnold Schwarzenegger wants to ensure that the government can delay the regulations if an emergency arises. The so-called "safety valve" sought by the administration has emerged as one of the key obstacles in negotiations over the landmark bill. Democratic lawmakers who are pushing the bill say they fear such a clause would provide more of an escape hatch than a safety valve, providing a loophole for industries that don't want to meet the emission limits. "We want to make sure we have a bill that's...