When China banned 24 kinds of solid waste last September, countries such as the U.S., the United Kingdom, Australia, and Japan realized they had a big problem. Until last year, China accepted 70 percent of the world’s electronic waste—discarded computers, cell phones, printers, televisions, microwaves, smoke alarms, and other electronic equipment and parts. After China stopped accepting this e-waste out of concern for its environment, Europe and North America began shipping more of it to Southeast Asia—but now Vietnam and Thailand, whose ports have been overwhelmed, are curbing imported e-waste as well.
In 2016, the world’s population discarded 49 million tons of e-waste (equivalent to about 4,500 Eiffel Towers). It’s estimated that by 2021, that number will grow to more than 57 million tons.
Why the upsurge in e-waste?
Technology is becoming more and more integrated into every aspect of our lives. Semiconductors and sensors are being added to products that never before had them, creating wearable monitors, smart homes, TVs that can stream programming from the internet, and much more.
Meanwhile, the life span of devices is getting shorter—many products will be thrown away once their batteries die, to be replaced with new devices. Companies intentionally plan the obsolescence of their goods by updating the design or software and discontinuing support for older models, so that now it is usually cheaper and easier to buy a new product than to repair an old one. Meanwhile, the companies continue to profit from steady sales.
And because prices are dropping, electronic devices are in demand around the world as a growing middle class goes digital. Globally, half of all households now have internet access, and 7.7 billion people have cell phones.
What’s in e-waste?
electronic waste management are made of a complex mix of materials that include gold, silver, copper, platinum, palladium, lithium, cobalt and other valuable elements. The U.S. Environmental Protection Agency (EPA) says, “One metric ton of circuit boards can contain 40 to 800 times the amount of gold and 30 to 40 times the amount of copper mined from one metric ton of ore in the United States.” These precious materials can be reclaimed through recycling.
But electronic devices also comprise toxic heavy metals like lead, mercury, cadmium and beryllium, polluting PVC plastic, and hazardous chemicals, such as brominated flame retardants, which can harm human health and the environment.
In 2016, the estimated value of recoverable materials in global e-waste was $64.6 billion, but only 20 percent of it was properly recycled to enable recovery of the valuable materials. Much of the rest is dumped in landfills where toxic chemicals can leach from the e-waste and end up contaminating the water supply.
As more people buy electronic equipment, manufacturers are beginning to face shortages of the raw materials needed to make their products, so reclaiming and reusing the materials from discarded products and waste—a process called urban mining—makes economic and environmental sense. A recent study in China found that mining copper, gold and aluminum from ore costs 13 times more than recovering the metals through the urban mining of e-waste.
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