Administrator, IADS, USDA
“There's a wealth of real possibilities for change to a more sustainable and more human course.” – Bill McKibben, billmckibben.com on Plan B.
When assessing the adequacy of basic resources such as land or water over time, population is the universal denominator: as population expands, per capita availability shrinks.
The world population took until the start of the 19th century to reach 1 billion people. As population growth...