24 julio 2015
As global population grew from about 500 million in 1560 to more than 7 billion, energy usage outpaced population growth. This in effect increased the world’s carrying capacity and allowed population to grow exponentially. Since 1963, however, the ratio between energy increases and population growth has narrowed. This change could restrict future population growth.img src=»http://feeds.feedburner.com/~r/sciencedaily/~4/ZPivPJKf1vw» height=»1″ width=»1″ alt=»»/
http://feeds.sciencedaily.com/~r/sciencedaily/~3/ZPivPJKf1vw/150724160616.htm
