The Delivering as One United Nations agenda aims at providing development assistance in a coordinated way at the country level, to ensure faster and more effective development operations, and accelerate progress to achieve the Millennium Development Goals. In the field of environment and sustainable development, UNDP and UNEP collaborate extensively together and with governments, NGOs and other UN agencies to support countries in achieving results that simultaneously promote human development and sound environmental management. This brochure provides examples of such UNDP and UNEP partnerships, including the UNDP-UNEP Poverty-Environment Initiative.