This report analyzes the economic opportunity that developing and emerging countries can now seize, if they adopt policies to fight climate change and invest in low-carbon growth. It quantifies the size of expected investment in clean technologies in the developing world over the next decade – and it finds that the opportunity is vast: the expected investment across a wide range of clean technology sectors, just in the world’s developing and emerging economies, will exceed $6.4 trillion over the next decade. Better still, about $1.6 trillion of that total offers an opening for small and medium-sized enterprises (SMEs) –key drivers of future job creation. SMEs also serve the local, rural and “base of the pyramid” markets that are often underserved by larger firms. Moreover, developing economies are already on the right track, with US$112 billion in clean-tech investments in 2012 – a 19 percent year-over-year increase.