Read this 4‑page Unit­ed Nations Sys­tem Chief Exec­u­tives Board (CEB) Joint State­ment to Rio +20 (dat­ed April 17, 2012).

The Rio +20 par­tic­i­pants “renew our com­mit­ment to sus­tain­able devel­op­ment” and describe their plan for get­ting “The Future We Want” (dat­ed June 19, 2012).

Read this detailed review of the imple­men­ta­tion of Agen­da 21 and the Rio Prin­ci­ples in Sus­tain­able Devel­op­ment in the 21st Cen­tu­ry (SD21), dat­ed Jan­u­ary 2012.