WASHINGTON -- President-elect Barack Obama and his energy team could face the most inauspicious climate in years for pushing ahead with their plans to remake U.S. energy strategy.

Mr. Obama plans soon to introduce his energy and environment team, which will include Nobel Prize-winning physicist Steven Chu as energy secretary and former Environmental Protection Agency Administrator Carol Browner as White House energy adviser.

The team's makeup shows that Mr. Obama plans to put a heavy emphasis on combating climate change and promoting technologies to wean the U.S. off imported oil. He is packaging such priorities as a way to boost employment and help the economy by pouring money into efficiency projects.

But the next administration will face a range of obstacles on the energy front, from plummeting oil prices and a declining economy to potential rifts among Mr. Obama's own advisers.

In a sign of one major internal difference, Mr. Chu has called for gradually ramping up gasoline taxes over 15 years to coax consumers into buying more-efficient cars and living in neighborhoods closer to work.