Reuters: A U.S. appeals court on Tuesday reinstated a Bush administration rule to reduce air pollution from power plants and help states downwind from the facilities meet federal clean air standards. A top broker in emissions allowances said trading in some pollutants soared on the news. One environmental advocate called the ruling a “holiday gift to breathers.” Tuesday’s ruling reversed a decision the same court, the U.S. Court of Appeals for the District of Columbia, made in July to …