
Port Harcourt, Nigeria —
The Nigerian city of Port Harcourt used to be known as "The Garden City." Black soot is now everywhere.

Port Harcourt, Nigeria —
The city is in the oil-producing Niger Delta region.

Port Harcourt, Nigeria —
A social media campaign has been launched by radio host Sandra Ezekwesili, #StopTheSoot.

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.

Port Harcourt, Nigeria —
People say the pollution is affecting their health.

Port Harcourt, Nigeria —
Residents have also taken to Twitter to express their frustration.

Port Harcourt, Nigeria —
"You go to bed, you wake up, you're covered in it," Ezekwesili told CNN.

Port Harcourt, Nigeria —
A soot-covered hand.

Port Harcourt, Nigeria —
"The air is thick with the soot," Ezekwesili said.



