Climate change, pollution, and you: is it too late to make a difference?

Climate change, pollution, and you: is it too late to make a difference?
Climate change, pollution, and you: is it too late to make a difference?

Climate change, pollution, and you: is it too late to make a difference?

The New York Times reported earlier this month the level of carbon dioxide has passed a long-feared milestone reaching a concentration not seen on the earth for three million years. What can be done? Is it too late? What are cities doing now? Karen Weigert, chief sustainability officer for the city of Chicago joins Donald J. Wuebbles, professor of atmospheric science at the University of Illinois to answer your questions.