Sacramento Bee: Efforts to roll back the state’s landmark climate change law have met stiff opposition from environmentalists and clean energy advocates. Now, the controversial ballot initiative is facing a more formidable foe: Hollywood. On Friday, Academy Award winning director James Cameron pledged $1 million to oppose the rollback initiative, or Proposition 23. The contribution signals Gov. Arnold Schwarzenegger’s increasing role in the ballot battle over the state’s greenhouse gas …