During icy Midwest winters, a Chicagoan’s step onto the sidewalk is often met with a familiar crunch underfoot. But salt, used to keep roads safe for driving and sidewalks safe for walking, comes with an ecological price: It ends up in our water, and once it’s there, it’s almost impossible to remove. As levels of chlorides continue to rise in Lake Michigan and exceed state limits in Chicago-area waterways, municipalities across the region are grappling with the urgent need to reduce the use of road salt in winter.
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