Definition of microplastics: Microplastics are very small pieces of plastic about the size of a grain of rice— usually 5 mm or smaller, that are substantially polluting our world. Where they are found: Microplastics are found everywhere. In fact, it is more difficult to find something not containing plastic in our current world. From cosmetics, to cleaning products, electronics, tea bags, glitter, and even clothing, almost everything we come into contact with every day contains plastic particles, and the majority of them are single use plastic. Some countries have even banned microplastics because they have caused extremely detrimental consequences to the planet. How they get there: Primary microplastics are those originally fabricated in small sizes. Secondary microplastics come from the breaking down of bigger plastic materials, such as bottles, bags, and even clothing. Why they are problematic to humans and the environment: Freshwater is an exhaustible natural resource and e...