Highway salts and different human sources are threatening world’s freshwater provides

When winter storms threaten to make journey harmful, individuals usually flip to salt to soften snow and ice. Highway salt is a crucial instrument for security, however a brand new examine warns that introducing salt into the atmosphere — for de-icing roads, fertilizing farmland or different functions — releases poisonous chemical cocktails that create a severe and rising world menace to our freshwater provide and human well being.