Those religious people who say that birth control is immoral and that predictions of the Earth’s future can contain indefinite growth should watch this series of YouTube videos of a lecture that Emeritus Prof. of Physics Albert Bartlett of the University of Colorado gave around 10 years ago, called Arithmetic, Population, and Energy. It might just be the most important video you ever see.
In the years since the video, nothing has happened to invalidate his major theorem, which is that there is no such thing as sustainable growth. Overpopulation makes sustainable growth an oxymoron. And, some of his conclusions may surprise you, such as that overpopulation is a problem not in developing countries, but in the United States.
Watch the videos.