The Obama administration is now seriously looking at radical technologies to combat global warming, according to the Associated Press.

One of the main ideas that is being considered is climate geoengineering.

Climate geoengineering involves the large-scale, deliberate modification of the Earth's environment to suit human needs and habitability. In this case, it is the act of deliberately manipulating the Earth's climate to counteract the effects of global warming from greenhouse gas emissions.

One particular option that was mentioned in the AP interview with John Holdren, who is the president's new science adviser, is shooting pollution particles into the upper atmosphere to reflect the sun's rays. Holdren cautioned that such a measure would only be used as a last resort.

A second option that he mentioned was the use of artificial trees to suck carbon dioxide out of the atmosphere and put it in storage.

Story by senior meteorologist Brett Anderson