Traffic is one of the biggest problems plaguing cities today. Idling cars cause increased emissions, more traffic means more accidents, and it is, of course, annoying. Meet traffic scientist, Dr. Alex Bayen who is working to solve...

George Akerlof, professor at the University of California at Berkeley says that in terms of global warming, the economics are pretty simple: tax the bads (like carbon.) The problem is fundamentally political, and can be resolved by...