Many Germans have three or four old cell phones lying about in a drawer somewhere without realising their value. A company is now offering to buy up the defunkt devices that contain copper, silver, gold and rare earth metals.
Climb the stairs with a spring in your step - literally! Scientists have created suspension steps that absorb users' energy during descent, to give it back later. They're supposed to make life easier for the elderly.
Toxic smoke from a huge fire at a recycling plant in Melbourne has hospitalized at least two people, emergency services said. Scores of nearby homes have been evacuated as firefighters continue to battle the blaze.
Kenyan artist Kioko Mwitiki’s life-sized scrap metal sculptures won him global acclaim. He tells DW about his art's impact, scavenging and environmental challenges facing Africa as it becomes the 'factory of the world.'
Some plants can suck up and store heavy metals. They can help clean up contaminated soil and extract valuable metals from the ground by a process of phytomining - all without a pickaxe or shovel.
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