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.
(March 2017) A sandworm is a fictional form of desert-dwelling creature from the Dune universe created by Frank Herbert. They first appear in the 1965 novel Dune, considered to be among the classics in the science fiction genre, and are iconic of the Dune series.