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.
The Great Sand Dunes sit on a large area of High Desert land in the San Luis Valley, just west of the Sangre De Cristo Mountains. The summer temperatures of this area are not typical of normal high desert lands although temperatures above 95 Â°F (35 Â°C) are not uncommon in July and August.