World at risk : a global issues sourcebook / CQ Press. International relations. World politics 21st century. Security, International. Environmental policy. Emigration and immigration. Economic history 21st century. Social history 21st century. JZ1242 .W67 2010 327 22 WOR Includes bibliographical references and index. Washington, D.C. : CQ Press, c2010. c2010. 2010 Text xvii, 822 p. : eng