Hans Rosling has done some research and ted talks about this: https://www.ted.com/talks/hans_rosling_on_global_population_growth https://www.ted.com/talks/hans_

Hans Rosling has done some research and ted talks about this: https://www.ted.com/talks/hans_rosling_on_global_population_growth https://www.ted.com/talks/hans_rosling_on_global_population_...