New York Times: As they watch President Obama`s ambitious health care plan crumble, the advocates of a comprehensive bill to combat global warming are turning their sights to a more modest package of climate and energy measures that they believe has a better chance of clearing Congress this year. Their preferred approach, a cap-and-trade system to curb emissions of climate-changing gases, already faced a difficult road in a bruised and divided Senate. Its prospects grew dimmer after the special …