Plastic bags have this recycling symbol right on them…
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…and yet we're not supposed to throw these scourges into the plastics recycling bin. And if you fill them with recyclable materials, like plastic bottles, and throw that into the recycling bin, guess what: The entire bag and its contents will end up in the trash rather than being recycled.
Why? In this short video, PBS demonstrates what happens to plastic bags when they go into the conventional recycling system: