Gov. Arnold Schwarzenegger signed a bill on Thursday to help speed up construction of an NFL stadium in the San Gabriel Valley. The legislation exempts the proposed 75,000-seat stadium from state environmental laws and is intended to hasten the planning process. The $800-million project by developer Ed Roski Jr. is planned near the junction of the 57 and 60 freeways. ?This is the best kind of action state government can create: action that cuts red tape, generates jobs, is environmentally friendly and brings a continued economic boost to California,? Schwarzenegger said. ?This legislation allows us to move forward with the construction of the nation?s greenest football stadium and create thousands of jobs.?