In recent years, the world has become increasingly preoccupied with the catastrophic potential of global warming and other human-induced environmental changes, and rightly so. But one of the most serious risks has been all but ignored: the threat to human health. ...Determined opponents will question the science and criticize those who claim that human health is being jeopardized by environmental disregard. But to these critics I pose a question of my own: “Are you willing to risk being wrong?" By Shaukat Aziz.