Last week, The Guardian’s James Randerson reported that a leading world expert on climate change, James Hansen, sent a message to president-elect Obama saying that the new president’s rhetoric must be backed by action

“Current approaches to deal with climate change are ineffectual, one of the world’s top climate scientists said … in a personal new year appeal to Barack Obama and his wife Michelle on the urgent need to tackle global warming.”

“With less than three weeks to go until Obama’s inauguration, Prof James Hansen, head of NASA’s Goddard Institute for Space Studies, asked the recently appointed White House science adviser Prof John Holdren to pass the missive directly to the president-elect.”

Read the full story in The Guardian.