Recycling plastic is more complex than it might appear. Not all plastics are the same, which is why a numbering system, the Resin Identification Code, was created. You can find this code—a number from 1 to 7 inside a triangle of arrows—on most plastic containers. This system was designed not for consumers but to help workers at recycling facilities identify and sort different plastic types. For example, plastic #1 (PET), used for soda bottles, and plastic #2 (HDPE), used for milk jugs, are commonly recycled. However, plastics like #6 (polystyrene) are notoriously difficult to recycle and are often sent to landfills. A major challenge in the process is contamination. A single wrong type of plastic or food residue in a batch can ruin the entire melt. Even when sorted correctly, most plastic is not truly recycled but 'downcycled.' This means it is reprocessed into a lower-quality material, such as carpeting or plastic lumber, which cannot be recycled again. For the system to work more effectively, consumers must meticulously rinse containers and understand which plastics are accepted in their local programs.
The passage defines 'downcycling' as the process of what?
- Sending plastics down a conveyor belt to be sorted into different quality levels.
- Reprocessing plastic into a material of lower quality that cannot be recycled further. (correct answer)
- Breaking plastic down into its original chemical components for reuse in new products.
- Reducing the amount of plastic that is sent to landfills through consumer education.
Explanation: The passage provides a direct definition: 'This means it is reprocessed into a lower-quality material, such as carpeting or plastic lumber, which cannot be recycled again.' This matches answer choice B perfectly. The other distractors describe different aspects of recycling or waste management that are not the definition of downcycling given in the text.