"In one of the first comprehensive studies of images captured by the Envisat satellite, researchers with French consultancy firm VisioTerra found evidence of 18,063 oil slicks in the Gulf of Guinea between 2002 and 2012.

While some of the slicks were caused by natural seepages from oil-rich coastal areas, the bulk were tied to shipping and offshore oil production.

Researchers told Mongabay the images suggest that the total amount of oil spilled into the Gulf of Guinea over the study period was greater than 2010’s Deepwater Horizon catastrophe, despite going largely unreported."

Ashoka Mukpo reports for Mongabay December 6, 2021. [2]