Port Harcourt: Why is this Nigerian city covered in a strange black soot?

Story highlights

  • The soot has been in Port Harcourt for over two years

Lagos, Nigeria (CNN)For more than two years, Saatah Nubari has woken up covered in a strange black soot.

There's been a literal cloud hanging over the southeastern city of Port Harcourt, Nigeria. People's clothes have been covered in soot. The streets are covered in soot. Even residents' bed sheets are covered in soot.
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