"[Professor Eric] Pianka then began laying out his concerns about how human overpopulation is ruining the Earth. He presented a doomsday scenario in which he claimed that the sharp increase in human population since the beginning of the industrial age is devastating the planet. He warned that quick steps must be taken to restore the planet before it's too late... Then, and without presenting any data to justify this number, he asserted that the only feasible solution to saving the Earth is to reduce the population to 10 percent of the present number... His favorite candidate for eliminating 90 percent of the world's population is airborne Ebola ( Ebola Reston ), because it is both highly lethal and it kills in days, instead of years."