Houston Chronicle: Houston, of all places, suddenly has a sweeping plan to fight global warming. America’s energy capital is seeking to slash emissions of carbon dioxide and other heat-trapping gases that contribute to climate change under the plan, which city officials released with little fanfare days before Hurricane Ike. The goal is to reduce this smoggy, sprawling city’s impact on the climate by buying renewable power and hybrid cars, replacing lightbulbs and rehabbing buildings to make them …