The 10th edition of the UNEP Year Book focuses on rapid change in the Arctic and minimizing chemical risks. It also reports on the spike in rhino and elephant poaching in Africa, growing urban environmental challenges, and the accelerating momentum to tackle short-lived climate pollutants. The UN Conference on Sustainable Development (Rio+20), the biggest environmental event of 2012, resulted in the strengthening of international environmental governance, a process towards developing sustainable development goals, and broad recognition of the role of a green economy in supporting sustainable development and eradicating poverty.