A NASA scientist says he welcomed President Bush's announcement Thursday of a new strategy on climate change.
Jim Hansen, a climate change expert at the Goddard Institute for Space Studies, says we must work together to reduce greenhouse gas emissions, or face some dire consequences.
"Time is really running out," Hansen says. "If we don't begin to make some changes in our emissions, reducing greenhouse gas emissions, we're going to get some really large climate changes."
Hansen also takes issue with NASA administrator Michael Griffin's views on global warming during an interview with Madeleine Brand. Griffin told NPR's Morning Edition that he isn't sure global warming is a problem we must tackle, a view Hansen says is "remarkably uninformed."