View the phenomenon of falling snow "seven Rainbow colors" few people know.

Temperatures across the North down, several locations in the high glacial phenomena happened Ice has covered white peaks Form the paint, creating interesting natural phenomenon made many people mistaking the snow. Snow White, usually it is because when light "touch" in the snow, it was scattered by the ice crystals and air pockets inside. At this time, almost the entire beam is turned backwards, out of the snow. Thus, the snow kept the color of sunlight is white. However, snow also has the more exotic colors which not everyone knows, such as red, yellow, black, and is formed principal "thanks to" the human hand Please also check out the exotic colors of snow under General from the page About Chemistry below. 1. Snow grey and black cod must have been many people who said that the snow is black it's unreasonable, but this strange phenomenon has just happened in Omsk, Siberia. Formation causes this strange colored snow was said to be due to emissions from power plant TPP-5. The plant operates with maximum power during the coldest period of the year The emissions caused by the work overload of condensation and "fall" down with snow white in some other regions of Russia, such as the Volzsk of snow are also found in black or grey. According to the scientists ' general air pollution is the culprit of this phenomenon. Air pollution occurs often due to operation of the mining plant produces coal, thermal power stations. Smoke contains dust and chemicals into the atmosphere. The presence of carbon monoxide (CO), sulfur dioxide, chlorofluorocarbons (CFCs), gas NO2 in the wastes of industry and vehicles cause unpleasant smelling atmosphere and reduced visibility 2. Red Snow If you have given the American Nevada climbing, you will admire the beautiful red snow types. Types of snow has a porous foam shape, red as watermelon snow Type is known as "watermelon snow"-watermelon snow is probably due to the color and porous foam looks like the intestines of watermelon. "Watermelon snow "also known as" snow algae "-algae snow firepower is by red in the snow formed by microscopic algae Chlamydomonas growth beneath layers of snow. According to the researchers, within the Chlamydomonas algae that contains chlorophyll green, but at the same time imply a red carotenoid pigment carrying capacity Carotenoids are organic pigments that form a protective role of algae from the ultraviolet rays from the Sun. This also explains why the watermelon snow are mainly found in the Alpine region, at altitudes of 3,000-3,600 m, or the polar regions, where most heavily influenced from the Sun, causing algae to promote production of carotenoids. Red snow are also found in the city of Buffalo, New York (USA) but is due to the workers destroyed a food factory red piping jelly containing 2. Pigment red broke and flowed down the snow, creating a very beautiful pink red color. However, snow does not harm human health 3. Yellow Snow algae may "dye" yellow for snow due to its pigmentation. However, the yellow snow mainly due to air pollution. In Russia's Sakhalin Island, people have witnessed a battle of yellow snow square falling. The experts identified the waste caused by the oil and gas were clinging to the cloud, and then under snow Thus, snow of gold is extremely toxic. Besides, according to the scientists, the sandstorm may also make up the snow. In 2006, a wave of snow mixed with gold dust and sand from northern China blows to the already falling down Seoul, South Korea. This type of yellow snow isn't toxic, but they can irritate the body with those who have sensitive skin. 4 Snow Orange, Orange snow fell in the broader region 3 1,500 square kilometres in SiberiaOrange Snow, Russia look very beautiful, sparkling, but is considered more dangerous snow yellow. They are very slippery, very dangerous to the media when the move, at the same time there is smell extremely unpleasant. According to the Agency's original Russian environmental monitoring, snow has this weird orange color may be caused by polluted from oil refineries. Proceed to check out, experts noted the concentrations of nitrate, acid, and iron ions in snow Orange fourfold higher natural snow. But then, the Orange snow was determined to be non-toxic However, local people were advised not to let pets have food and snow. Later, when determining the majority of snow are all mixed clay and sand, experts estimate, the cause of this phenomenon is due to the sand storm from Kazakhstan, Russia's neighbors blow đến. * The article uses references from the source: Chemistry, Wikipedia. You can see more: 7 weather event "extremely unusual" in human history "freeze" when the temperature drops to 50 degrees Celsius.