We all know bottled water gets a bad rap, but it's totally warranted. In addition to the bottle itself posing a microplastic problem after breakdown, a recent study published in Frontiers in Chemistry identified microplastics in the water of 93% of the 259 bottles analyzed. Polypropylene, a commonly used polymer in plastic bottle caps, was found in the highest amounts.

Again, microplastic consumption has yet to be proven harmful to humans, but it remains an emerging field of study. We already know possible carcinogens such as BPA and vinyl chloride are used in the production of plastics, so it's best to exercise caution. While you probably can't control the shedding of your tires, try reducing your overall use of plastic, shopping for higher quality clothing, and avoiding bottled water to reduce your (and others') exposure to microplastic pollution.