Christian Science Monitor: Call it a hat trick: The phrase ‘clean coal’ turned up in all three presidential debates, with both McCain and Obama supporting it. It turned up four times if you count the vice-presidential debate. And woe betide any politician who doesn`t appear to be in favor of it. Speaking Tuesday in Joe Biden`s hometown of Scranton, Pa., Sarah Palin blasted the Democratic vice-presidential candidate for telling an activist in Ohio last month that the Obama campaign doesn`t support clean coal. …