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.
White Sands Information. White Sands National Monument rises from the heart of the Tularosa Basin and created the world's largest gypsum dune field. Here, great wave-like dunes of gypsum sand have engulfed 275 square miles of desert and preserves a piece of New Mexico's unique geology.