Researchers from the York University in Toronto and the Environment and Climate Change Canada have found that substances used as alternatives to ozone-depleting chlorofluorocarbons may be just as harmful. Researchers found an increasing accumulation of these chemicals in the Canadian Arctic dating back to the 1990s. The compounds detected are in the same class as perfluoroalkyl substances, or PFAS. These long-lasting chemicals are found in everything, from furniture to clothing and food wrapping to drinking water. The related products, found in the Arctic ice samples, do not break down in the environment, and have been found at 10 times higher levels now than seen before the Montreal Protocol, said researchers.