‘Burning coal emits far more climate-warming carbon dioxide than natural gas does, but it also releases lots of sulfates and other particles that block incoming sunlight and help cool the Earth…’
‘Using more natural gas for fuel could also produce leaks of methane, a heat-trapping greenhouse gas more than 20 times more potent than carbon dioxide, study author Tom Wigley said in a statement.’
via Switch from coal to natural gas no boon to climate | Reuters.