Reuters: Tiny plastic beads from beauty products are showing up in North America's Great Lakes, and an environmental group is calling upon companies to stop using the plastic particles. Scientists have already been found the particles, known as microplastic, floating in the oceans but recently reported the same contamination in the largest surface freshwater system on the Earth. The particles are often less than a millimeter (0.04 inch). A team of researchers with 5 Gyres Institute, a non-profit California-based...