Former U.S. Energy Secretary Chu still believes that climate change is our biggest problem

Q&A: Steven Chu on returning to Stanford, his time as U.S. Energy Secretary

[Q] As energy secretary, you encouraged better collaboration between
science and technology and government to tackle the biggest problems of
the day. What's the No. 1 problem on your list?

[Chu] Climate change. We're heading into an era where if we don't change what we're doing, we're going to be fundamentally in really deep trouble. We're already in trouble. So we have to transition to better solutions.