"White House Council on Environmental Quality Chairwoman Nancy Sutley will step down in February, marking the almost complete turnover of President Obama's top environment and energy officials."

"Sutley, appointed at the outset of Obama's presidency, has kept a lower political profile than some other top officials. But she played a crucial role in several major administration policies, the White House said.

The White House has not yet named Sutley's replacement."

Ben Geman reports for National Journal December 3, 2013. [2]