7 Billion: How Did We Get So Big So Fast?

I first saw the 7 Billion video as a post from Phil Wagner on google+. Do you have concerns about the population on our planet? Most of us do. This video will give you a picture of where population growth is taking place. It was just over two centuries ago that the global population was 1 billion - in 1804. I think you will find this youtube video very interesting.