Aspen Daily News: The United States will not be in a position to be a global leader on greenhouse gas reduction strategies in Copenhagen this December unless it adopts a significant new policy at home, experts said Thursday. “For the U.S. to lead, we have to be able to control our own emissions,” said Rafe Pomerance, president of the Climate Policy Center and chairman of Americans for Equitable Climate Solutions, at an Aspen Institute panel yesterday. “We have proclaimed our desire to lead but have not …