When we think about snow, we usually say that its color is white. Well on Wednesday, 27,000 people living in three different Siberian regions would beg to differ. Red, green, and yellow snow fell over 100 square kilometers in the cities of Omsk, Tomsk, and Novosibirsk. The colored snow was tested and proved to be not toxic.

Snow on Beacon Hill in Boston, Massachusetts

http://upload.wikimedia.org/wikipedia/commons/f/f0/Beacon_Hill_Winter_Boston_MA_USA.jpg

Emergency Situations Ministry spokesman Viktor Beltsov. said that the discoloration in that snow may have been caused by the soils and dust blown into the atmosphere from neighboring Kazakhstan. The local residents have been warmed not to drink or touch the snow. No health problems have been reported.

Source:

http://www.enn.com/today.html?id=12150