From CNN's Jack Cafferty:

No pressure, but as President, Barack Obama has just four years to save the planet. That's the dire warning from NASA scientist Jim Hansen, who says it's urgent for the new President to take the lead and do something about climate change.

Scientists believe that Greenland, with its melting ice caps and disappearing glaciers, is an accurate thermometer of global warming.

Hansen says in four years it will be too late. The consequences of doing nothing will include rising oceans, collapsing ice sheets, flooding, dying species, and disrupted weather patterns.

Carbon levels have already sent greenhouse warming past the point of no return and efforts to stop them from rising aren't working. Clearly a new approach is needed.

Hansen is urging the Obama administration to order an investigation of the ice caps around the world as the first order of business for the climate office. He's been asking the British Royal Society and the National Academy of Sciences to do so but it hasn't happened yet.

He makes it clear that the only way global warming can be solved is if the United States takes a leadership role. Without the U.S. aggressively pursuing solutions, Hansen says we are doomed.

Here’s my question to you: Where does global warming rank on the list of things that concern you?

Interested to know which ones made it on air?

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