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The Surprising History of Road Salt
Amid "salt shortages," officials protect roads against ice with rock salt, which is mined around the country.
Amid "salt shortages," officials protect roads against ice with rock salt, which is mined around the country.
Source: National Geographic News
Posted on: Thursday, Feb 13, 2014, 9:15am
Views: 1126
Posted on: Thursday, Feb 13, 2014, 9:15am
Views: 1126
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