Others may appear, green, brown or black, or combinations of these colors. These icebergs have usually rolled over, exposing basal ice, or have emerged from below water level. The various colorations are caused by differences in density, air-bubble content and impurities. For example, black ice is of high density and bubble free; dark layers indicate the presence of rock materials derived from the base of the parent glacier.Although this iceberg is natural, let's all recycle an extra piece of paper or can today. Photo courtesy: Rundboll
Are we polluting the Earth so badly that ice is turning black? Not exactly. Photographer and Reddit user, Rundboll, uploaded this image of a black iceberg on the social media website on Friday, causing an uproar from users. Does this mean that we're in danger? Not exactly. The Canada Encyclopedia describes this as a result of density differences.