USA Today: President Obama is losing his top adviser on energy and climate change issues.
Heather Zichal plans to step down in the next few weeks after five years in the administration.
A replacement for Zichal, the deputy assistant to the president for energy and climate change, has not been named.
From Reuters:
"Zichal, 37, has advised Obama since his 2008 presidential campaign and helped shape the administration's policies to curb greenhouse gas emissions blamed for contributing to global warming....