The idea that the world is overpopulated has led to some disastrous policy attempts around the world to limit population growth.
Following the tumultuous 1960's, the U.S. passed a historic slate of landmark environmental laws. Could today's divided nation do the same?
52 years since the first celebration, as climate change becomes more and more serious, has Earth Day lost a bit of its charm?
Some climate resilience strategies could cause a problem for residents in nearby neighborhoods. How can we bring them into the solution?