The Doubled Times of Humanity Are Getting Shorter and Shorter

The author argues that there are too many people in the world. He says if growth continues for 900 years, there will be 60 million billion people on the face of the Earth. That is about 100 persons for every square yard of the Earth's surface, land and sea. It would take only about 50 years to populate Venus, Mercury, Mars, the Moon, and the moons of Jupiter and Saturn to the same population density as Earth.