‘Forever contaminant’ road salts pose an icy dilemma: Do we protect drivers or our fresh water?
This article is republished from The Conversation under a Creative Commons license. By Jovana Radosavljevic, Jiangyue Ju and Water Institute members David L Rudolph, Fereidoun Rezanezhad, Nancy Goucher and Philippe Van Cappellen.
As winter approaches, many communities in Canada and around the world arm themselves against icy roads and sidewalks with a time-honoured ally: road salt. For decades, applying road salt has been regarded as a simple but vital tool in countering the dangers of slippery road conditions, but the downsides of its use are apparent with implications that extend beyond the cold months.