Choosing salt, sand or deicers to clear snowy roads

[img_assist|nid=7838|title=Click on photo to enlarge or download|desc=A truck spreads deicer around the street in Washington to prevent blocked roads from Friday’s snowstorm. SHFWire photo by Ilana Strauss.|link=popup|align=right|width=640|height=480]WASHINGTON - Humans have armed themselves in the battle against Mother Nature's icy storms. Some use shovels. Some use snow blowers. But nothing seems more powerful than salt.