The predictions are that our planet we reach 7 billion people on October 31, 2011.
It took only 13 years for us to gain our last billion!
How many children do women say are ideal?
Nigeria = 9.1
Austria = 1.6
The world has never seen anything like the population explosion of the past century. The United Nations projects that the global population will top 9 billion by 2050 and 10 billion by 2100. But these projections are uncertain, as they depend on assumptions about the future, such as how many children a woman will have 20 or 30 years hence. This video, part of Science's special issue on Population, highlights demographic trends around the globe, which offer a window into what our future world may look like.