Homeland security U.S. Brownfield

More than half of the nations's electricity comes from coal, and needed nal capacity is being built to keep the U.S. electricity supply adequately diversified. Most of that new coal-fired capacity is being developed at Brownfiedl sites using a of coal technologies. Alors que plus de la moitie de l'electricite est fournie, aux Etats Unis, par des centrales thermiques au charbon, des capacites de production suplementaires sont entrain d'etre construites, pres des mines de charbon, pour satisfaire la demande sans cesse croissante.