https://www.weforum.org/agenda/2015/09/what-are-the-sustainable-development-goals/
http://www.theguardian.com/global-development/2015/jan/19/sustainable-development-goals-united-nations
http://www.icsu.org/publications/reports-and-reviews/review-of-targets-for-the-sustainable-development-goals-the-science-perspective-2015/SDG-Report.pdf