Andrew Kenny, physicist and mechanical engineer: South Africa faces energy calamity on two fronts. First is the disaster of Eskom. Second, and potentially worse, is the disaster of our REIPPPP

Max Roser, economist, geoscientist, philosopher, Founder and Program Director, Our World in Data: To see where we are coming from we must go far back in time. When you only consider what the world

John Shanahan is a civil engineer and past president of Go Nuclear, Inc. and Environmentalists for Nuclear - USA: The debate on catastrophic man-made global warming involves many aspects of physics