British philanthropist Sir Richard Branson is offering a pretty big carrot, $25 million dollars, to the inventor of a mechanism that will actively absorb and store carbon dioxide. The World's Lisa Mullins speaks with a British researcher about carbon dioxide and how it contributes to global warming. And keeping with the climate change theme, Marco Werman speaks with the CEO of Interface, one of the world's biggest commercial carpet manufacturers. Ray Anderson hopes to make his company more environmentally -minded without affecting his bottom line.