A good place to start for an overview on the research on that causation is Hans Rosling, http://www.nooventures.org/hans-rosling-on-global-population-growth htt

A good place to start for an overview on the research on that causation is Hans Rosling, http://www.nooventures.org/hans-rosling-on-global-population-growth http://www.nooventures.org/hans-rosling-on-global-population... and http://www.gapminder.org/ http://www.gapminder.org/