Spider-Man, Spider-Man, can he do anything a sweeper can?
According to the World Bank, the amount of waste is increasing.
In 2016, cities around the world generated more than 2 billion tons of solid waste, resulting in a footprint of 0.74 kilograms per person per day.
Much of this trash ends up on the streets, and Nigerian environmentalist Jonathan Olakunle disguises himself as Marvel Comics superhero Spider-Man to help clean up the streets of Osogbo.
Researchers at the Chinese University of Hong Kong have created a "soft robot" made out of mud with magnetic particles that can be manipulated with external magnets.
The magnetic particles are toxic but have theoretically been secured for entry into the human body after being coated with a layer of silicone compound, although further safety testing is required in the future.
The Hong Kong team hopes the slime will one day be used to retrieve accidentally swallowed items.
You can read more about the team's research here .
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Researchers estimate the UK's lateral flow testing program produced enough plastic waste to fill 200,000 bathtubs, or 19 Olympic-size swimming pools.
Scientists at the Institute for Energy and the Environment at the University of Hull say once we had known that Covid-19 spreads more through the air than on surfaces, the UK government should have started recycling evidence to stop unnecessary plastic pollution avoid.
The government says it has already made changes to make testing more sustainable. But should we have recycled our lateral flow test kits?
BBC health reporter Laura Foster, who has collected the waste from all her lateral flow tests, explains the situation in two minutes.
