US Democratic Candidates Play Up "Clean Coal"
Both Hillary Clinton and Barack Obama are talking more about "clean coal" and less about global warming as they woo voters in West Virginia and Kentucky -- two states that sit at the heart of the nation's coal economy. In a bid to draw voters ahead of Democratic primaries in West Virginia on Tuesday and Kentucky on May 20, both candidates are playing up the ascendant role of commercially untested and so far economically nonviable ways of converting America's plentiful coal supplies into electricity without spewing massive quantities of heat-trapping greenhouse gases.