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The coast of Majuro, a coral atoll in the Pacific Ocean, is dotted with concrete walls, boulders and piles of vegetation to stave off storms and rising sea levels. But the barriers haven’t stopped the flooding and erosion that threaten Majuro, which is the capital of the Marshall Islands and home to 27,000 people. The government is fighting back with a new protection programme, funded with more than US$19 million from the World Bank and $25 million from the Green Climate Fund (GCF), a flagship United Nations entity set up in 2010 to help vulnerable nations ward off and adapt to the effects of climate change.