The cry about the menace of black soot in port harcourt can never be over emphasized. Recently a topic was created here on nairaland suggesting a possible relationship between black soot exposure and infertility in males. I decided to do a research on that and I found two well researched articles linking infertility and exposure to black soot. Rivers people please wake up!!! #stoptheblacksootnow.
1) https://onlinelibrary.wiley.com/doi/full/10.1111/and.13866

2) https://www.semanticscholar.org/paper/Prolonged-Exposure-to-Environmental-Black-Soot-on-Onyeso-Okpara/25a6ffb61b444ecde6162d2d617a30a5311819f6