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Climate and Environment

    • Hand washing some of your clothes can reduce microplastics in the environment: study

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    An overwhelming 9.5 billion tonnes of plastic was produced by the world in 2019, according to the , a U.K. non-profit.

    While some efforts to reduce plastic waste are being made, such as through elimination of plastic at grocery stores, or the riddance of plastic straws by , one unexpected contributor to the overwhelming amount of microplastics in the environment could be the way clothes are washed.

    A new published in the American Chemical Society (ACS) journal ES&T Water found that handwashing clothing made with plastic-fibres such as polyester and nylon releases less microplastics into the environment as opposed to using a washing machine.

    Past has confirmed the high amounts of microplastics released though laundry machine washing. That鈥檚 why a of team of researchers based in the U.S. and China sought to further explore the results of handwashing, according to the ACS study.

    WHAT ARE MICROPLASTICS?

    Microplastics are the tiny plastic particles, smaller than five millimetres, according to the , that result from both commercial products, such as cosmetics and clothes, and the breakdown of larger plastics.

    The problem with microplastics, is that like all sizes of plastic waste, the fibres do not easily break down into harmless molecules, and will take hundreds or thousands of to fully decompose.

    Until then, it鈥檚 estimated there are 24.4 trillion pieces of microplastics that litter our oceans and are extremely harmful to the environment.

    One major source of this environmental damage is from the microplastic fibres shed through laundering synthetic fabrics, according to the study.

    THE STUDY: METHOD AND FINDINGS

    To further understand which washing methods drive higher amounts of microplastic shedding, the researchers cleaned two types of fabric swatches, one made from 100 per cent polyester, and the other made up of 95 per cent polyester and 5 per cent spandex. They ran the fabrics through a washing machine and hand-washed them as well.

    They found that manually handwashing methods released significantly few plastic fibres.

    It鈥檚 all in the numbers: when the first fabric made completely of polyester was washed via machine, it shed an average of 23,723 microplastics, compared to 1,853 microplastic pieces shed on average when hand washed.

    The study also found that the fibres released by handwashing tended to be longer. (Officially microplastics are defined as being less than five millimetres (0.2 inches) in diameter.)

    Some sneaky ways that the shedding of microplastics were found to increase while handwashing however were by using detergent, pre-soaking fabrics, and using a washboard 鈥 but the number of fibres was still less than through the washing machine method.

    They also found that factors such as water temperature or amount, type of detergent, and wash time, did not appear to have any substantial impact on how many microplastics shed when handwashing.

    The researchers hope that these findings will encourage greener laundry practices in the future, says the for the study.

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