Agenda item 27: United Nations Conference on the Human Environment : report of the Secretary-General (A/8688, A/8691, A/8703/Add.1 (Part II), A/8783 and Add.1; A/CONF.48/14 and Corr.1; A/C.2/L.1227, A/C.2/L.1228, A/C.2/L.1229/Rev.1, A/C.2/L.1230-1234, A/C.2/L.1235).