Mars has a very thin atmosphere composed of carbon dioxide is mainly caused by sublimation of the dry ice (solid carbon dioxide) are covered on the surface of Mars North Pole and South Pole area of the ice (Ice water) are covered at all times.
Mars has a very thin atmosphere Carbon dioxide is mainly caused by sublimation of ice. (Solid carbon dioxide) covered are common on the surface of Mars. At the north pole and the south pole of the planet with ice (Ice water) covered at all times.