ACCORDING TO THE United Nations Environment Programme (UNEP), up to 5trn plastic bags are consumed each year. Disposed of improperly, they can clog waterways, choke marine life and provide a breeding-ground for malaria-carrying mosquitoes. When dumped in landfills, they can take centuries to decompose.
Plenty of governments have decided that enough is enough. On July 20th Panama became the latest to ban single-use plastic bags. More than 90 countries have similar restrictions (Tanzania and New Zealand recently implemented their own bans). Another 36 regulate them with levies and fees. Bans are particularly widespread in Africa. This is partly because relatively low waste-collection and recycling rates make the problem of waste plastic more visible, partly because Africa exports very little plastic and lacks a strong industry lobby.