Although it receives only limited media attention, population growth is a major driver of spiraling global energy consumption. In the world's most-populous nations, such as China and India, millions of people are buying energy-consuming items ranging from cars to cookstoves to computers for the first time.
The world's 7-billionth person will be born Oct. 31 in India, according to a projection by researchers working with data from the United Nations.
Click here for the Bloomberg News report on the projected arrival of Earth human No. 7 billion.
--Jack Z. Smith