Liquid h2o are not capable to exist on the surface area of Mars due to lower atmospheric stress, besides at the lowest elevations for little intervals. The two roman policier ice caps appear to be made mainly of consuming drinking water. The quantity of h2o ice in the south roman policier ice cap, if melted, would be adequate to go over the comprehensive planetary surface to a depth of eleven meters. A permafrost mantle stretches from the pole to permission of about 60'. Massive quantities of drinking h2o ice are thought to be trapped beneath the thick cryosphere of Mars.