Port Harcourt, Nigeria — The Nigerian city of Port Harcourt used to be known as "The Garden City." Black soot is now everywhere. PIUS UTOMI EKPEI/AFP/AFP/Getty Images Port Harcourt, Nigeria — The city is in the oil-producing Niger Delta region. PIUS UTOMI EKPEI/AFP/AFP/Getty Images Port Harcourt, Nigeria — A social media campaign has been launched by radio host Sandra Ezekwesili, #StopTheSoot. PIUS UTOMI EKPEI/AFP/AFP/Getty Images Port Harcourt, Nigeria — The cause of the soot is has been a mysterious to residents, but many think it's related to the destruction of illegal oil refineries. PIUS UTOMI EKPEI/AFP/AFP/Getty Images Port Harcourt, Nigeria — People say the pollution is affecting their health. PIUS UTOMI EKPEI/AFP/AFP/Getty Images Port Harcourt, Nigeria — Residents have also taken to Twitter to express their frustration. PIUS UTOMI EKPEI/AFP/AFP/Getty Images Port Harcourt, Nigeria — "You go to bed, you wake up, you're covered in it," Ezekwesili told CNN. PIUS UTOMI EKPEI/AFP/AFP/Getty Images Port Harcourt, Nigeria — A soot-covered hand. PIUS UTOMI EKPEI/AFP/AFP/Getty Images Port Harcourt, Nigeria — "The air is thick with the soot," Ezekwesili said. PIUS UTOMI EKPEI/AFP/AFP/Getty Images Prev Next