Financing remains one of the greatest challenges in advancing sustainable development. Hundreds of trillions of dollars need to be invested over the coming decades to drive economic progress. The challenge will be ensuring that this investment is consistent with and supportive of sustainable development. UNEP is active alongside other parts of the UN and many other partners in creating the conditions to meet this challenge. It contributes to the development of national environmental policies and international agreements including, economic measures that steer sustainable production and consumption. Such measures range from engagement in macroeconomic planning, to fiscal action and public procurement, support to small and medium sized enterprises, research and development and technology deployment.