In the 2012 edition of its flagship report, Worldwatch celebrates the twentieth anniversary of the 1992 Earth Summit with a far-reaching analysis of progress toward building sustainable economies. Written in clear language with easy-to-read charts, State of the World 2012 offers a new perspective on what changes and policies will be necessary to make sustainability a permanent feature of the world's economies. The Worldwatch Institute has been named one of the top three environmental think tanks in the world by the University of Pennsylvania's Think Tanks and Civil Societies Program.