Silver is a whitish precious metal and has been used since about 4000 BC for various purposes such as money, silverware, jewelry and so on. Silver is measured in troy ounces. A troy ounce is 31.10348 grams.
Food Desert Locator from the USDA. GoodFood World Staff, May 4th, 2011. The official definition of a food desert is a low income census tract where at least a third of the residents are a mile from a supermarket or large grocery store.
Differences in the definition of a food desert vary according to the: type of area, urban or rural; economic barriers and affordability of accessing nutritious foods, including the cost of transportation, price of foods, and incomes of those in the area; distance to the nearest supermarket or grocery store