San Jose Mercury: The U.S. Environmental Protection Agency’s decision Wednesday to block California’s pioneering effort to reduce greenhouse gas emissions from cars is outrageous and deplorable. It’s further proof that the Bush administration remains blind to what the law, science and good public policy require to combat climate change. California must challenge this decision vigorously in court, as Gov. Arnold Schwarzenegger has vowed to do. And Congress should step in, if needed, to help overturn …