Nanoplastics are tiny bits of plastic. Many sources define them as less than 1 micrometre (µm), but there is no one size rule. Sun, wear, and weather can break big plastic into smaller bits. We know people and wildlife may meet these bits. But we do not yet know the health risk from daily exposure.…

Plastic pollution does not disappear when a bottle, bag or piece of packaging breaks apart. In many cases, it simply becomes harder to see. That is where microplastics come in. These tiny plastic particles have now been found in oceans, rivers, sediments, soil, air, drinking water, food and human biological samples. Some begin life at…