Climate Change, Environment, Language, Sustainability, Science.
http://www.fao.org/wairdocs/lead/x6113e/x6113e06.htm Natural Resources Conservation Service. (1995, December). Retrieved June 12, 2016, from http://www.nrcs.usda.gov/wps/portal/nrcs/detail/wi/technical/cp/cta/?cid=nrcs143_014211 Oklahoma National Stockyards. (2016, June 7). Retrieved June 13, 2016,