Many diseases and conditions are spread by not washing hands with soap and clean, running water. If clean, running water is not accessible, as is common in many parts of the world, use soap and available water.
Riverdale covers about three square miles in area. It has one of the highest elevations in New York City, affording it views of the Empire State Building, George Washington Bridge, Hudson River and New Jersey Palisades.
Riverdale is an affluent, upper middle class residential neighborhood in the northwest portion of the Bronx, a borough in New York City. Riverdale, which has a population of 47,850 as of the 2000 United States Census, contains the northernmost point in New York City.