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Many African countries now require people to wear a mask when out in public. This is part of the effort to stop COVID-19 from spreading. Cloth masks reduce the number of droplets that are spread into the environment when people breathe, cough or sneeze.

Internet connected devices need power. That either means connecting them to the grid, which limits what we can use them for, or using batteries. So as the Internet of Things grows and more and more internet-enabled devices and sensors are rolled out as is expected, it could produce billions of extra batteries that have to be recycled every year, or else will just be thrown away.