“Ten phones, two laptops, digital cameras… all just sitting here. We’re not dealing with it.” Louise Lewis is surveying a collection of old gadgets that have piled up in her home.
Her technological stash, experts say, is typical. But it could jeopardise our ability to manufacture new devices.
A study has estimated that as many as 40 million unused gadgets are languishing in UK homes.
Each device contains multiple valuable and increasingly endangered elements.
The growing, unseen shortage of so-called “rare earth elements” was the impetus for the Royal Society of Chemistry’s survey of just how much unused technology we are all stockpiling.
The organisation carried out an online survey – completed by more than 2,000 people – which revealed that half of UK households had at least one unused electronic device and 45% of homes had up to five. Most people admitted they had no plans to recycle their collection.
What elements could we run out of?
“There are about 30 different elements just in a smartphone,” said Dr Elisabeth Ratcliffe from the Royal Society of Chemistry, “and many of them are very rare.”
The metal indium, she explained, is used in a unique compound called indium tin oxide, which is vital for touch screens, because it conducts electricity and is transparent. “It’s also used in solar panels, so we’re going to need a lot of it in the future.
“There’s not a lot of it in the Earth and you need a kilo of ore to extract just a few milligrams of indium.”
Most of us will not have heard of tantalum, but it’s a highly corrosion-resistant metal that is “perfect for small electronic devices like our phones”, explained Dr Ratcliffe. “But it’s also perfect for hearing aids and pace-makers,” she told BBC News.
Scientists estimate that indium and tantalum mines, among others, could run out within a century. Meanwhile, our demand for new technology continues to increase.
“Even the copper in all that wire is not endlessly abundant,” added Dr Ratcliffe. “On top of that, most of these devices are coated in plastic, which could be recycled.”
Elements in smart phones that could run out within the next 100 years
- Gallium: Used in medical thermometers, LEDs, solar panels, telescopes and has possible anti-cancer properties;
- Arsenic: Used in fireworks, as a wood preserver and added to poultry feed to prevent disease;
- Silver: Used in mirrors, reactive lenses that darken in sunlight, antibacterial clothing and gloves for use with touch-screens;
- Indium: Used in transistors, microchips, fire-sprinkler systems, as a coating for ball-bearings in Formula One cars and solar panels;
- Yttrium: Used in white LED lights, camera lenses and can be used to treat some cancers;
- Tantalum: Used in surgical implants, electrodes for neon lights, turbine blades, rocket nozzles and nose caps for supersonic aircraft, hearing aids and pacemakers.