Then the snow surface will actually help reflect sound waves. Sounds may seem clearer and travel farther under these circumstances. Fresh, undisturbed snow is composed of a high percentage of air trapped within the ice lattice of the accumulated snow crystals. Fresh, uncompacted snow typically is 90 to 95 percent trapped air. Since still air is an efficient insulator, heat transfer is greatly reduced.
Clean snow is certainly edible.
Snow in urban areas may contain pollutants that one should not eat but they would probably be in such low concentrations that it might not matter. Sometimes snow contains algae which gives it a red color. The temperature at the surface of the snow is controlled by the air temperature. The snow near the ground in deeper snowpacks, however, is warmer because the deeper snow helps retain the heat stored in the ground. The deeper the snow, the thicker the blanket of insulation which slows the flow of heat from warm ground to cold air.