For some reason, humans enjoy making predictions of death and destruction. From politicians to fanatical religious leaders, there is a lot of money to be made telling people that Earth is toast.
Of course, the predictions never come true, but that doesn't prevent doomsayers from making more of them. "One of these days, it will be true," they warn, as they wag their wrinkly finger in our faces.
The most famous finger-wagger was Thomas Malthus, who said that the world population would grow so large that we couldn't feed ourselves anymore. He was wrong, but that didn't stop Paul Ehrlich from resuscitating his argument 170 years later in The Population Bomb. He was wrong, too, but that didn't stop Quartz from reanimating this ideological corpse once again.