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Electronic Waste
Where Old Phones Really Go
Related Worksheets
Electronic waste, or e-waste, includes discarded phones, computers, chargers, batteries, and other devices. Old phones matter because billions of people replace them often, and the world produces about 53 million tons of e-waste each year. Inside a phone are useful materials like copper, gold, aluminum, and rare earth elements, but also hazardous substances that can harm soil, water, and people. Where a phone goes after disposal affects pollution, resource use, and human health.
A phone can follow several paths after it leaves its owner: reuse, repair, certified recycling, landfill disposal, or informal recycling. Proper recycling can recover precious metals and reduce the need for mining, but unsafe dismantling can release lead, mercury, cadmium, acids, and toxic smoke. In some informal recycling regions, including parts of Ghana and India, workers may burn wires or use chemicals without protection to recover metals. The right to repair movement aims to make devices easier to fix, which can extend product life and reduce waste.
Key Facts
- Global e-waste production is about 53 million tons per year.
- Mass balance for a recycled phone: total mass = recovered materials + residual waste + emissions.
- Toxic e-waste components can include lead, mercury, cadmium, brominated flame retardants, and battery electrolytes.
- Recycling rate = recycled e-waste mass / total e-waste mass x 100%.
- Reuse and repair usually save more energy and materials than recycling because the whole device stays in service longer.
- Proper disposal options include manufacturer take-back programs, certified e-waste recyclers, municipal collection sites, and donation of working devices.
Vocabulary
- Electronic waste
- Electronic waste is discarded electrical or electronic equipment, such as phones, computers, batteries, and chargers.
- Informal recycling
- Informal recycling is material recovery done outside regulated systems, often with limited safety equipment and pollution controls.
- Precious metal recovery
- Precious metal recovery is the process of extracting valuable metals such as gold, silver, palladium, and copper from discarded electronics.
- Right to repair
- Right to repair is the idea that consumers and independent shops should have access to parts, tools, and information needed to fix products.
- Extended producer responsibility
- Extended producer responsibility is a policy approach that makes manufacturers responsible for collecting or recycling products after use.
Common Mistakes to Avoid
- Throwing phones in regular trash, because landfills can allow toxic metals and battery chemicals to leak into soil or water.
- Assuming recycling always means safe recycling, because informal processing can expose workers and communities to toxic smoke, dust, and acids.
- Ignoring data removal before donation or recycling, because personal information can remain on a device unless it is backed up, signed out, and factory reset.
- Replacing a phone when a repair would work, because extending device life usually reduces mining, manufacturing energy, and total waste more than buying a new model.
Practice Questions
- 1 A school collects 240 old phones with an average mass of 0.18 kg each. What total mass of e-waste did the school collect in kilograms?
- 2 A city generates 12,000 kg of e-waste in a month and sends 4,500 kg to certified recyclers. What is the recycling rate as a percent?
- 3 Compare two choices: repairing a phone for two more years or replacing it immediately and recycling the old one. Explain which choice usually has the lower environmental impact and why.