Greenwire: The chairwoman of the White House Council on Environmental Quality today emphasized the Obama administration’s intent to mitigate climate change as it pulls the nation out of the biggest economic slump since the 1930s. As it begins divvying up a $787 billion economic stimulus package — what some say embodies the largest energy bill in U.S. history — the Obama administration is pressing Congress to pass a cap-and-trade scheme that will cut U.S. carbon dioxide and other heat-trapping …