<http://schema.org/alternativeHeadline>
"Salt saves lives on icy roads, but it can have the opposite effect in nearby ecosystems. Here's a look at the pros and cons of it and other de-icers."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/translating-uncle-sam/stories/de-icing-dilemma-do-streets-need-salt>