<http://schema.org/about>
"For snow to form, there has to be stuff in the atmosphere \u00AD\u2014 microbes, specks of dust \u2014 for water molecules to freeze on and then form ice crystals."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/climate-weather/stories/how-it-snows-for-days-in-the-arctic>