Review of Targets for the Sustainable Development Goals: The Science Perspective (2015)
The SDGs offer a "major improvement" over their predecessors, the Millennium Development Goals (MDGs). However, this report by the International Council for Science (ICSU) and the International Social Science Council (ISSC) finds that of the 169 targets beneath the 17 draft goals, just 29% are well defined and based on the latest scientific evidence, while 54% need more work and 17% are weak or non-essential.