New York Times: China`s frenetic construction of coal-fired power plants has raised worries around the world about the effect on climate change. China now uses more coal than the United States, Europe and Japan combined, making it the world`s largest emitter of gases that are warming the planet. But largely missing in the hand-wringing is this: China has emerged in the past two years as the world`s leading builder of so-called clean coal power plants, mastering the technology and driving down the …