Coal top enemy in fighting global warming

Reuters: Cheap coal will be the main enemy in a fight against global warming in the 21st century because high oil prices are likely to encourage a shift to coal before wind or solar power, a top economist said on Thursday. Coal emits far more greenhouse gases, blamed by most scientists for a rise in world temperatures, per unit of energy when burned in power plants or factories than oil or natural gas. "The most important environmental problem in the 21st century is coal, or you ... Link