Bloomberg: Agbakla Amartey trudges through the sand near the village of Totope, Ghana, and points out the submerged concrete walls of a house. “This used to be my room,” Amartey says above the crash of Atlantic Ocean waves pounding the coastline. “Yes, this would have been the roof.” Totope, on a slip of land that juts off the Ada peninsula east of Accra, Ghana’s capital, is one of 22 coastal settlements the local government says may be swallowed by the ocean over the next few …