WASHINGTON (AFP) - The hungry global economy is eating up the earth's natural resources at a far faster rate than they can be renewed, a US environmental expert warned. AFP-NASA/File Photo The bleak warning was made by Lester Brown, president and founder of the Washington-based Earth Policy Institute, who has published his findings in a United Nations (news - web sites)-funded book. "We are releasing carbon dioxide into the atmosphere faster than the earth can absorb it, creating a greenhouse effect," Brown said. "Our existing economic output is based in part on cutting trees faster than they can grow, overpumping...