E-waste (electronic waste) is discarded electronic devices such as televisions, cell phones, and computers (EK STB-3.K.3 in APES Topic 8.9). It matters on the exam because these devices contain heavy metals like lead and mercury that can leach out of landfills and contaminate groundwater.
E-waste is exactly what it sounds like, electronics we throw away. The CED names televisions, cell phones, and computers as the classic examples (EK STB-3.K.3), but anything with a circuit board counts. Because technology turns over so fast, devices become obsolete in just a few years, so the volume of e-waste keeps climbing even though each device is small.
Here's the part APES actually cares about. E-waste is a weird mix of treasure and poison. The same circuit boards that hold valuable metals like copper and gold also contain toxic substances like lead, mercury, and cadmium. When e-waste goes into a regular sanitary landfill, those heavy metals can end up in the leachate (the liquid that drains through trash). If the liner or leachate collection system fails, that contamination reaches groundwater. That's why many places ban e-waste from regular landfills, and why bans can backfire into illegal dumping or shipping e-waste to countries with weaker regulations.
E-waste lives in Topic 8.9 (Solid Waste Disposal) in Unit 8: Aquatic and Terrestrial Pollution, under learning objectives 8.9.A (describe solid waste disposal methods) and 8.9.B (describe the effects of those methods). The CED explicitly defines e-waste in EK STB-3.K.3, which means it's fair game as a direct definition question. But its real exam value is as a bridge. E-waste is the example that connects solid waste disposal to landfill design (liners, leachate collection from EK STB-3.K.4), groundwater contamination, heavy metal toxicity, and the recycling and recovery solutions covered later in Unit 8. If a question asks why landfills need bottom liners or why some items aren't accepted in sanitary landfills (EK STB-3.L.3), e-waste is one of your go-to examples.
Keep studying AP Environmental Science Unit 8
Landfill (Unit 8)
E-waste is the test case for why landfill design matters. A sanitary landfill's bottom liner and leachate collection system exist to stop exactly the kind of toxic runoff that crushed electronics produce. When those systems fail, heavy metals from e-waste ride the leachate straight into groundwater.
Heavy Metals (Unit 8)
Lead, mercury, and cadmium in electronics are the reason e-waste is dangerous in the first place. Once these metals reach water, they don't break down, they persist and can bioaccumulate in organisms. E-waste is basically a heavy metal delivery system if it's disposed of carelessly.
Recycling (Unit 8)
E-waste is the strongest argument for recycling you can make on an FRQ. Circuit boards contain recoverable copper and gold, so recycling keeps toxic metals out of landfills and reduces the mining needed for new metals. One solution, two benefits.
Hazardous Waste (Unit 8)
E-waste sits right at the boundary between solid waste and hazardous waste. The device itself is solid waste, but the lead and mercury inside behave like hazardous waste once they escape. That overlap is why many communities require special e-waste collection instead of curbside trash pickup.
E-waste shows up most often in multiple choice as an identification question. You'll get a scenario like a recycling center receiving discarded cell phones, old TVs, and broken monitors, and you'll need to label it e-waste. The step-up version gives you the full chain, asking what happens when e-waste containing lead and mercury goes into a conventional sanitary landfill, and the answer runs through leachate and groundwater contamination. No released FRQ has used the term verbatim, but e-waste is a ready-made example for FRQ prompts about solid waste disposal methods, landfill design, or describing one environmental consequence of a disposal method and proposing a solution. If you can write the sentence "e-waste contains heavy metals like lead and mercury that can leach into groundwater, so it should be recycled to recover metals like copper and gold," you've covered both 8.9.A and 8.9.B in one move.
E-waste is a category of solid waste defined by what the item is (a discarded electronic device). Hazardous waste is defined by what the material does (it's toxic, corrosive, flammable, or reactive). E-waste contains hazardous components like lead and mercury, which is why it gets special handling, but a whole television in a bin is classified as solid waste, specifically e-waste. On an MCQ, if the stem lists discarded phones, TVs, and computers, the answer is e-waste, not hazardous waste, even though the toxicity is what makes it a problem.
E-waste is discarded electronic devices, with televisions, cell phones, and computers as the CED's named examples (EK STB-3.K.3).
E-waste contains valuable recoverable metals like copper and gold alongside toxic heavy metals like lead and mercury, which is why recycling it solves two problems at once.
When e-waste goes into a conventional landfill, its heavy metals can enter the leachate and contaminate groundwater if the liner or leachate collection system fails.
Rapid technological turnover shortens product life cycles, which is the main driver behind the growing volume of e-waste.
E-waste is one of the items often banned from sanitary landfills, and like used tires, banned items can end up illegally dumped, creating new environmental problems (EK STB-3.L.3).
E-waste is discarded electronic devices, including televisions, cell phones, and computers. It's defined in EK STB-3.K.3 under Topic 8.9 (Solid Waste Disposal) in Unit 8.
Not exactly. E-waste is classified as solid waste, but it contains hazardous components like lead and mercury. The device is e-waste, the toxic stuff inside is what makes it behave like hazardous waste once it leaks.
The lead, mercury, and cadmium in electronics can dissolve into landfill leachate, and if the landfill's liner or leachate collection system fails, those heavy metals contaminate groundwater. Heavy metals also persist in the environment instead of breaking down.
Yes, and that's the exam-ready solution. Recycling e-waste recovers valuable metals like copper and gold while keeping toxic metals like lead and mercury out of landfills and groundwater.
Yes. E-waste is named directly in the CED (EK STB-3.K.3), so it can appear in MCQs asking you to identify discarded phones, TVs, and computers as e-waste, or to explain the groundwater consequences of landfilling it.