"President Barack Obama is leaning toward choosing Gina McCarthy, a top official in charge of air quality at the Environmental Protection Agency, to run the EPA in his second term, according to two sources familiar with the matter."

"McCarthy, currently the assistant administrator for the EPA Office of Air and Radiation, would take on the top job as the agency leads Obama's push for measures to fight climate change.

McCarthy would replace Lisa Jackson, who said in December she planned to step down as EPA chief.

A final decision has not been made, and one source cautioned that Bob Perciasepe, Jackson's deputy, was still in the mix for the administrator post."

Jeff Mason reports for Reuters February 4, 2013. [2]