TOPSHOT - A fisherman stands on oily mud in the river during low tide at Ogoniland's village of K-Dere, near Bodo, which is part of the Niger Delta region, on February 20, 2019. - According to the Movement for the Survival of Ogoni People (MOSOP), the river has been damaged by repeated oil spills since 70's. Due to the destroyed ecosystem of the river, all fishermen are forced to reach out to the ocean. Nigeria, Africa's biggest oil producer with some two million barrels per day, relies on the sector for 90 percent of foreign exchange earnings and 70 percent of government revenue. (Photo by Yasuyoshi CHIBA / AFP)