EPA chief: Obama to work with Congress on climate

The United States for the first time outlined a dual path Wednesday toward cutting greenhouse gases that would involve both the Obama administration and Congress.

Speaking at a U.N. climate conference in Copenhagen, Environmental Protection Agency Administrator Lisa Jackson described the EPA's decision that greenhouse gases should be regulated as complementary to U.S. legislation — not an effort to supplant the work of Congress.

"This is not an either/or moment. This is a both/and moment," she told more than 100 people who packed a U.S. meeting room in the conference center. Negotiators at the 192-nation U.N. conference are also working to bridge the chasm between rich and poor countries over how to share the burden of fighting climate change.