Richard Heinberg on the past and future growth of the human population

“Over the past two centuries, human population has grown at rates ranging from less than one percent to more than two percent per year. In 1800, world population stood at about one billion; by 1930 it had doubled to two billion. Only 30 years later (in 1960) it had doubled again to four billion; currently [...] http://bit.ly/cnZgD5