Volunteers clean a beach in groups in the suburb of Dakar, Senegal, on Sept. 13, 2020. Given that trashes brought by sea wave and rainfall during the rainy season have polluted the coast, volunteers and local residents participated in a beach cleaning activity in Thiaroye-sur-Mer, a small town in the suburb of Dakar, hoping more tourists would be attracted by a more cleaner beach. (Photo by Louis Denga/Xinhua)

Photo taken on Sept. 13, 2020 shows trash on a beach in the suburb of Dakar, Senegal. Given that trashes brought by sea wave and rainfall during the rainy season have polluted the coast, volunteers and local residents participated in a beach cleaning activity in Thiaroye-sur-Mer, a small town in the suburb of Dakar, hoping more tourists would be attracted by a more cleaner beach. (Photo by Louis Denga/Xinhua)

Volunteers clean a beach in groups in the suburb of Dakar, Senegal, on Sept. 13, 2020. Given that trashes brought by sea wave and rainfall during the rainy season have polluted the coast, volunteers and local residents participated in a beach cleaning activity in Thiaroye-sur-Mer, a small town in the suburb of Dakar, hoping more tourists would be attracted by a more cleaner beach. (Photo by Louis Denga/Xinhua)

Photo taken on Sept. 13 shows trash brought by the sea wave and heavy rainfall on a beach in the suburb of Dakar, Senegal. Given that trashes brought by sea wave and rainfall during the rainy season have polluted the coast, volunteers and local residents participated in a beach cleaning activity in Thiaroye-sur-Mer, a small town in the suburb of Dakar, hoping more tourists would be attracted by a more cleaner beach. (Photo by Louis Denga/Xinhua)

Volunteers clean a beach in groups in the suburb of Dakar, Senegal, on Sept. 13, 2020. Given that trashes brought by sea wave and rainfall during the rainy season have polluted the coast, volunteers and local residents participated in a beach cleaning activity in Thiaroye-sur-Mer, a small town in the suburb of Dakar, hoping more tourists would be attracted by a more cleaner beach. (Photo by Louis Denga/Xinhua)