ABC News Online, Posted 5 hours 0 minutes ago
US president-elect Barack Obama has nominated a Harvard university physicist to lead his science and technology team in the White House.
John Holdren is a leading expert on climate change who has advocated a robust government response to the problem.
Analysts say the appointment signals a change from the policies of the Bush administration, which has been criticised for not taking climate change seriously.
In his weekly video address, Mr Obama said science needed to be placed at the top of the agenda.
"Whether it's the science to slow global warming, the technology to protect our troops and confront bio-terror and weapons of mass destruction, the research to find lifesaving cures or the innovations to remake our industries and create 21st century jobs - today more than ever before science holds the key to our survival as a planet and our security and prosperity as a nation," he said.