The UNEP Year Book 2010 reports on new environmental science and recent developments in our changing environment. It looks at progress in environmental governance; the effects of continuing degradation and loss of the world’s ecosystems; impacts of climate change; how harmful substances and hazardous waste affect human health and the environment; environmentally related disasters and conflicts; and unsustainable use of resources. The chapters correspond to UNEP’s six thematic priorities. The purpose of the Year Book is to strengthen the science-policy interface. Thus, it presents recent developments and new scientific insights of particular interest to policy-makers. The UNEP Year Book 2010 is essential, informative and authoritative reading for anyone with the role or an interest in our changing environment.