Think about the last smartphone, tablet or smartwatch you stopped using. Odds are it is not in a recycling bin or a new owner’s hands; it is sitting in a drawer.

From our survey of 4,000 American consumers, we found the single most common thing people did with a device they were finished with was nothing at all: 39% simply stored it. Recycling and reselling, outcomes better for the environment, each accounted for only about 1 in 10 devices. Throwing devices in the trash claimed another 9%.

What people do with old electronics

Funded by the National Science Foundation, our multidisciplinary team blended our expertise in causal inferencesustainability and cybersecurity, to work on the tangled question of what people do with their consumer electronics when they’re done using them. We used statistical models to connect what people say – that is, their stated knowledge and attitudes – to what they actually did.

Why the drawer wins

Two main forces keep devices in the drawer. The first is anxiety about data. People who worried that recycling or reselling a device would compromise their data were 14% and 9% more likely to store it instead.

The second force is simply not knowing how to. People who did not know where to recycle were 10% more likely to hold onto a device, and many also kept old gadgets as a perceived data backup.

Recycling and reselling electronics are a lot easier than a lot of people think. In the U.S., the national chain Best Buy accepts devices for recycling; reselling online is convenient with vendors such as Back Market and Gazelle.

Just be sure to wipe data before parting with a phone or computer. Also, remove the device from your account, for instance with Apple or Android. Unless you do, the device stays locked to you, and no one else can use it.

We also compared what people intended to do with what they had actually done. This led to a telling detail: Data security worries led to people storing devices at a greater rate than they said they intended to.

In other words, the fear of leaking personal data kicks in only when someone is facing the real decision of whether to hand off their device to a recycler or secondhand buyer.

Getting at why people don’t recycle

Researchers have long studied why people do or don’t recycle electronics: Convenience, awareness and incentives showed up as affecting the decision. But prior work examined recycling as the only option.

Instead of considering the issue as a yes-or-no vote on recycling, we treat it as a comparison between different options: Storing, reselling, donating, trading in, recycling and throwing away the device in the trash. When modeling this way, trade-offs became visible.

Knowing where to recycle, for instance, made recycling 47% more likely, but it also pulled people away from reselling, which is often the more environmentally friendly choice. You can explore the survey results in our interactive dashboards.

Getting people to let go

Storage is the worst of both worlds: A device sitting unused for years loses its resale value, and erasing its data only gets harder over time. The good news is that the main barriers – data concerns and not knowing where to turn – can be addressed with better information.

We are experimenting with information interventions that walk people through their options, including how to securely wipe their data. We are testing nudges with randomized, controlled trials to test what leads people to give their old electronics a second life.

It might be a good time to remember what old devices you’re holding onto and revisit your reasons for not letting go of them.

This article originally appeared on The Conversation. You can read it here.

  • Solar-powered boat feasts on trash and could solve the ocean’s plastic waste problem
    Photo credit: Ocean Cleanup on YouTubeThe Interceptor boat-barge could significantly clean our waters.

    Our oceans have a plastic problem. While it’s difficult to put a 100% accurate number on it, scientists estimated about 4.8 to 12.7 million metric tons of plastic waste entered the ocean in 2010 alone according to the journal Science. This issue has caused scientists and engineers to create a boat-barge in Los Angeles that skims the oceans to gobble up the plastic we leave behind.

    Devised by the non-profit Ocean Cleanup organization, the garbage-gulping Interceptor boat-barge is actually a smaller platform nestled within a larger boat. A floating barrier moves collected trash into the device onto a conveyor belt. An automatic shuttle then collects the trash from the conveyor to send it to a separate barge where there are six dumpsters to hold it. The solar-powered system can hold up to 20,000 lbs. of garbage. The trash is then separated into different categories (plastics, metal, etc.) so they can be disposed of responsibly.

    Catching ocean trash from the source

    Ocean Cleanup hopes to make a dent cleaning the Great Pacific Garbage Patch in the Pacific Ocean. However, they decided to first attack the plastic ocean problem at its source: rivers. When it rains, a lot of trash from the hills and valleys washes down into the nearest river. While there is significant ocean trash taken from beaches, they have found that the lion’s share of garbage that floats into our oceans actually comes from rivers and tributaries that lead into it. Essentially, the plan is to get ocean trash before it even enters the ocean.

    “We have to turn the faucet off before we can scoop the ocean, or else all we’re doing is taking out legacy trash to replace it with new trash,” James Patterson, the operations manager of Ocean Cleanup said to The Guardian. “Before you can clean out the Great Pacific Garbage Patch, you really need to turn off the source.”

    How the Interceptor is helping Los Angeles and beyond

    There is an Interceptor already doing its work at the mouth of Ballona Creek in Culver City, California. Since 2025, the Interceptor has prevented 143,710 lbs. of trash from entering the ocean via the creek. As a bonus, the Interceptor’s trash sweeping has lowered government budgets for beach grooming. Since there is less trash, the beach doesn’t need to be cleaned as often.

    There are two more Interceptors planned to be at the mouths of the San Gabriel River and the Los Angeles River. This can help clean up the rivers for the upcoming 2028 Summer Olympics for aquatic events.

    There are currently 21 Interceptor systems throughout the globe. Countries using them include Indonesia, Vietnam, Jamaica, Guatemala, the Dominican Republic, and Malaysia.

    If this is an issue that speaks to you, you can help even if you don’t live near an ocean. There may be a nearby river or creek that could benefit from volunteer cleanups. Do some research to find an organization near you to volunteer. If you can’t locate one, groups like River Cleanup can help you organize your own group. Much like how a small drop contributes to a large ocean, a small pick-up can make a big difference.

  • As climate change causes flooding in London, experts found an effective, low-cost solution: beavers
    Photo credit: CanvaBeavers are solving several climate issues.

    West London’s Greenford Tube station had an ongoing problem. Due to climate change, the station would often flood during heavy rains. The rain would cause a nearby creek to overflow, flooding the ticket office and beyond. But in 2023, officials tried a natural method to help offset the flooding. All they had to do was bring back a vanished species to the area: beavers.

    A family of five beavers was released through the Ealing Beaver Project to act as “nature’s engineers” and help solve London’s flooding problem. Within weeks, the beavers built a dam in the creek, causing it to pool into a pond. Along with that, the beavers created new pathways and tributaries that further diverted water from the main creek. The small group of beavers not only built seven dams in their first year but also expanded biodiversity near populated areas.

    The combination of rerouting water and felling trees has brought new animals and species into the area. Some of the new additions inhabiting the creek are freshwater shrimp, two types of bats, a rare brownstreak butterfly species, and eight new species of birds. A whole new nature preserve is forming remarkably close to urban areas. In fact, the beavers are working just 100 meters behind a McDonald’s.

    What happened to the original beavers?

    The whole project is addressing the changing climate, but also undoing another man-made issue. The Eurasian beaver had been hunted to extinction in England and Wales more than 400 years ago. At the time, beavers were a valuable source of meat, fur for coats, and castoreum. Castoreum is a secretion from beavers that was used to enhance perfumes and flavor food. Had beavers still thrived, one could argue that the climate change-related flooding might not have occurred in the first place.

    The Ealing Beaver Project is one of several efforts to bring beavers back to the United Kingdom. One of the first attempts to repopulate beavers occurred in Scotland, where Norwegian beavers were introduced to Inverness-shire. Norwegian beavers were chosen because scientists determined they were the most genetically similar to the extinct U.K. beaver population.

    This beaver introduction hasn’t just solved a climate-related flooding problem, but it has also brought other benefits. Visitors and residents enjoy the newly biodiverse nature reserves by going on “beaver safaris” to see the creatures at work in person. Then there is the obvious benefit of the beavers solving these flooding problems effectively free of charge.

    Beavers are an international solution

    The U.K. isn’t the only place using beavers to address climate issues. Beavers were brought in to create dams and conserve river water during droughts in Utah. Similarly, beaver reintroduction into California’s streams and rivers was so beneficial that it was codified into state law.

    This shows that something as funny-looking as a swimming rodent with buck teeth and a paddle tail can make a huge difference in whether a place has enough natural water or too much. Humans just have to give a dam about them.

  • Wildlife reserves and gardens alike can be regrown thanks to dogs wearing backpacks with seeds
    Photo credit: Photo credt: @wilderlife8107 on YouTubeNative plants can be regrown thanks to dogs.

    Whether it’s a forest recovering from a wildfire or our own backyards, nature can use some help. Spreading seeds to ensure grass or wildflower growth can be a time-intensive process. However, there is one way that can be fun, quick, and help your dog get some exercise: strapping a backpack full of seeds onto them.

    The practice has been popularized internationally by sisters Francisca and Constanza Torres with their three dogs. Many forested areas of their native Chile were devastated by wildfires. The sisters came up with a plan to help reseed and regrow what had been burned down. The two would strap backpacks filled with grass and wildflowers seeds onto their border collies. The backpack had a small opening that would allow the seeds to fall out and spread as their dogs ran, jumped, and played throughout the area. 

    This helped the forests regrow while also providing the dogs exercise. The dogs were also able to walk into nooks and crannies human planters normally can’t access.

    An idea goes international

    The idea spread past countries and coastlines as a nature reserve in Lewes, East Sussex, England offered dog walkers backpacks with seeds. The walkers would strap the packs onto their furry friends as they went on nature walks to help rewild the area.

    “We’re really interested in rewilding processes, but they often involve reintroducing big herbivores like bison or wild horses,” said the project’s manager Dylan Walker to The Guardian in 2024. “In a smaller urban nature reserve it’s really hard to do those things. So, to replicate the effect that those animals have on the ecosystem we aimed to utilize the vast number of dog walkers that are visiting the nature reserve daily.”

    The concept itself was taken from nature. For centuries, wolves would have seeds caught in their fur. Over time, movement, and grooming, the seeds would be spread throughout other areas of the forest. The wolves acted as natural carriers for seeds much like bees are for pollen.

    Reseed your garden with Rover

    This technique doesn’t have to be reserved for wildfire recovery or regrowing public gardens. Your yard could benefit from it, too. While you could find a pack for your pup and fill it with seeds, there’s another way. Gardener Patrick Vernuccio suggests just filling a tea strainer with seeds and clipping it onto your dog’s collar. It should perform the same effect.

    If you have your dog help seed your yard, be sure that the plants you hope to grow are dog-friendly. Use non-toxic seeds for dogs such as roses, marigolds, and pansies among others. The ASPCA has a full list of plants that are unsafe for dogs to refer to when you’re unsure.

    Man’s best friend can also be man’s best gardening buddy.

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