Vital signs. Volume 20, The trends that are shaping our future / Worldwatch Institute ; Michael Renner, project director ; Linda Starke, editor. - 1 online resource (218 pages) ISBN: 9781610914574 Subjects--Topical Terms: Population.Agriculture.Sustainable development. Index Terms--Genre/Form: Electronic books. LC Class. No.: HB871 / .V583 2013 Dewey Class. No.: 301.32