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.
Desert: a region with so little vegetation that no significant population can be supported on that land. This implies that it is dry, but not necessarily hot. There are several kinds of deserts, but they all have one thing in common - they each receive less than 25 cm (~10) of precipitation per year. Polar ice and snow deserts - the cold climate produces both low precipitation and relatively high evaporation rates, e.g., Antarctica.