Salt

We often take salt for granted, but this edible mineral is essential for human life. And it has a long history. Before refrigeration, people used salt to preserve food. Soldiers of the Roman Empire received their pay in sail. Even Christopher Columbus was on the hunt for salt when he landed in the New World. In some cultures, salt was considered more precious than gold. The countries of North America have always had plentiful natural resources. But the exploitation of these resources comes at…