User:EKPoarch/My first sandbox

I am a member of the National Marine Educator's Association

David Pimentel, professor of ecology and agriculture at Cornell University, and Mario Giampietro, senior researcher at the National Research Institute on Food and Nutrition (INRAN), place in their study Food, Land, Population and the U.S. Economy the maximum U.S. population for a sustainable economy at 200 million. To achieve a sustainable economy and avert disaster, the United States must reduce its population by at least one-third, and world population will have to be reduced by two-thirds, says the study.

A more recent study by Pimentel and colleagues (2010) suggests that the Earth can support a population of two billion individuals, but only if all individuals are willing to live at a European standard of living and use natural resources sustainably. These researchers state that reducing population from today's level of over 6.8 billion to the suggested 2 billion would take slightly longer than 100 years if every couple, worldwide, agrees to produce an average of only one child.