Students from a primary school read books inside a classroom on Ghoramara Island, India, November 16, 2018. Ghoramara Island, part of the Sundarbans delta on the Bay of Bengal, has nearly halved in size over the past two decades, according to village elders. REUTERS/Rupak De Chowdhuri SEARCH "CHOWDHURI COASTLINE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.