Chlorofluorocarbons or CFCs are a chemical compound containing carbon, chlorine, and fluorine. Throughout the 20th century, CFCs were mass produced for their popularity in refrigeration and spray cans. In the 1970s, evidence began to show the harmful effects of CFCs on Earth.
Originally created as Great Sand Dunes National Monument on March 17, 1932, Great Sand Dunes National Park and Preserve was established by an act of the United States Congress on September 13, 2004.
World Parnoug. gand. When it comes to white, powdery sand, nothing. compares with Siesta Key, Florida. In fact, in the. Great International Sand Challenge held in 1987, Siesta Key's Crescent Beach was rated The World's. Finest, Whitest Sand, beating out more than 30 other. entries, including the Bahamas and Grand Cayman.