Nobel winner driven by curiosity

A climate scientist born in Japan is among the recipients this year of the Nobel Prize in Physics. Syukuro Manabe reflected Tuesday on the award and his career.

Manabe demonstrated how carbon dioxide contributes to global warming. He is based at Princeton University in New Jersey. He told a crowd there that, when he started his research, he could not imagine the consequences.

The scientist said climate change has become interwoven with problems related to energy, agriculture and water. He said trying to understand it is not easy. But he said the arguments over global warming are bewildering.