(Washington Post via MSN) – When a car rolls down a freeway, a fine spray of microplastics spews out from its tires. When you wash your clothes, millions of tiny synthetic microfibers spill into waterways. And those tiny pieces of plastic may be harming our health, a new study shows.

In a paper published Wednesday in the journal Environmental Science and Technology, researchers at the University of California at San Francisco evaluated dozens of studies in mice and humans to learn how microplastics may be harming digestive, respiratory and reproductive health. They found that these shards — which are now virtually everywhere in the air we breathe, the water we drink and the food we eat — are suspected of links to colon cancer and lung cancer. (Read More)