Biodegradable plastic bags and product packaging are touted as green alternatives to their traditional counterparts. A new study indicates this may not be the case, after all. Researchers at Loughborough University in England found that compounds commonly added to eco-friendly, “oxo-degradable” plastic to help it break down — typically metal salts like cobalt, iron or nickel — make it unfit for composting and recycling. The study also expressed concern about insects and fish that may ...

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