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.
In the past month, floods in eastern Australia have killed 22 people and inundated thousands of homes.
The crisis has channeled politicians' ongoing anger at their reactions.
In this video, two locals share their dramatic stories of being stranded, helping others, and why they still feel abandoned.
BBC Isabelle Rodd video
Every year we throw away millions of tons of e-waste: old computers, cell phones, televisions. They all have circuit boards on them.
Now the Royal Mint has figured out a way to turn them into gold, which they plan to use to make commemorative coins.
BBC Science editor Rebecca Morelle visited their factory in Llantrisant, South Wales, to find out how it's made.
Pearce Jarrett is a machine learning engineer and the founder of Gwaan, a motivational fitness app that uses AI technology.
The 28-year-old launched the app 18 months ago and has since won a UKRI Young Innovators Award.
According to new figures from UK universities, less than 2% of academic staff working in science, technology, engineering and mathematics are black. The British Science Association calls for better representation of the British workforce as part of British Science Week.
Journalist: Adina Campbell
Filmed and Edited by: Aisha Doherty
Pearce Jarrett is a machine learning engineer and the founder of Gwaan, a motivational fitness app that uses AI technology.
The 28-year-old launched the app 18 months ago and has since won a UKRI Young Innovators Award.
According to new figures from UK universities, less than 2% of academic staff working in science, technology, engineering and mathematics are black. The British Science Association calls for better representation of the British workforce as part of British Science Week.
Journalist: Adina Campbell
Filmed and Edited by: Aisha Doherty
