They also discuss starvation, obesity, green economics, and nuclear futures. 

Dr. Steven Koonin, a University Professor at NYU, has served as the Department of Energy's Under Secretary for Science, as Chief Scientist for BP, and as professor and Provost at Caltech. He is a member of the National Academy of Sciences, a Governor of Lawrence Livermore National Laboratory, a senior fellow of Stanford's Hoover Institution, and a Trustee of the Institute for Defense Analyses. Koonin holds a BS in physics from Caltech and a Ph.D. in theoretical physics from MIT. He wrote the recent bestseller "Unsettled: What Climate Science Tells Us, What It Doesn't, and Why It Matters."