The world's population has exploded over the past century, growing from less than 2 billion to 7 billion people. And it's not stopping. The U.N.'s current projection is that humanity will number 9.3 billion individuals in 2050, and then hit 10.1 billion by 2100. Meanwhile, our energy resources are dwindling and droughts threaten our food supplies.
Have we reached a population crisis that will eventually destroy Homo sapiens entirely? How will we ever maintain our numbers at a sustainable size? The solutions to our population problem may be even more dangerous than the problem itself.