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To Safeguard Gardens

Look for: Magnesium or calcium chloride and/or urea

Why: While all chlorides are salts, magnesium and calcium won't harm yards like sodium can. Urea is also in fertilizers—good for plants in small doses.

Product picks: Safe Step Mag Chloride 8300 earned Environmental Protection Agency recognition for ingredients that pose a low risk to the environment (about $10; WinterGreen is made of urea pellets coated in ice-melting calcium chloride (about $35;
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