A Tanzanian hawker (L) sells plastic bags, while others present new alternative bags at the local market in Dar es Salaam on May 31, 2019. - A plastic bag ban comes into force in Tanzania on June 1, 2019, as Africa leads efforts to stem the tide of plastic blighting the farthest reaches of the globe, and depths of the ocean. Tanzania is banning the importation, production, sale and use of plastic bags, becoming the 34th African country to implement such restrictions, according to the United Nations Environmental Programme (UNEP). (Photo by Said KHALFAN / AFP)