They inhabit two different worlds—buildings and climate change—both outside and within the World Bank. It should not be that way as the building sector could be central to both mitigation and adaptation efforts.
Buildings are important for climate mitigation because they account for about 30% of global energy consumption and greenhouse gas emissions. According to the International Energy agency  (IEA), energy use in this sector is expected to increase globally about 30 % over the next two decades if recent trends continue; however, the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report  concludes buildings offer by far the largest potential source for low cost reductions in CO2 emissions. The World Bank has many projects and analyses addressing this opportunity including a recent ESMAP (Energy Sector Management Assistance Program) report  on the benefits and obstacles to effective building codes. These could address over 60 % of building energy use but remain weak and often unenforced in most Bank client countries.
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