(par 5.2.1.4.1 ) How Will We Feed a World of Nine Billion People
How Will We Feed a World of Nine Billion People? http://news.nationalgeographic.com/2015/07/150701-hunger-food-agriculture-population-ngbooktalk/# By Simon Worrall, National Geographic, 1 July 2015 The key, says the author of a new book, is to use water…