The human population of planet Earth is rapidly approaching 7 billion. This week, we’ll look at how fast our numbers are growing, what they mean for things like resources and the environment, and what we can do about it. Maybe. We’re joined by William Ryerson, President and Founder of Population Media Center and President of Population Institute. And on the podcast, we’ll get a lesson in how population projections are created, and how reliable they are, with Dr. Ronald Lee, Director of the Center on the Economics and Demography of Aging, and professor in the Department of Demography at the University...