An unlikely natural ally in the fight against microplastics has been discovered. Researchers in China have found that invasive water hyacinths are adept at absorbing microplastics without harm to the plant itself. Experiments against a control group showed that plastics were mostly trapped on the outside of the water hyacinth's root systems. The few that get inside the plant are quickly separated before nutrients get to the leaves. Typically, plants exposed to microplastics suffer ill effects. Water hyacinths are native to South America. Two plants were able to produce 1,200 daughter plants in four months, according to one study. Any given population of water hyacinth can double in size in six days. Once dropped into a new foreign habitat, invasive species ... can squeeze out native species, reduce biodiversity, and eliminate vital ecosystem services. Not long ago, Arkansas had to issue a statement on the threat water hyacinths posed to agriculture. On the flip side, microplastics are a scourge. They'll often end up in the fish we catch, and once eaten by humans, they can cause problems with the endocrine, immune, and reproductive systems. Despite their rapid proliferation, it may still be worth strategically deploying water hyacinths. Other studies have shown that water hyacinths can also absorb heavy metals and agricultural runoff. Meanwhile, enterprising individuals have been able to take the excess biomass of the plants and turn it into briquettes and bioplastics.