Tiny bits of plastics have been linked to both human and environmental health threats — and the continuing accumulations of plastics pollution is magnifying the danger. Fulton Schools Professor Rolf Halden, director of ASU’s Biodesign Center for Environmental Health Engineering, is among engineers, scientists and others warning of the impacts of plastics used for food packaging and a vast number of other products, including automobile tires. When the chemicals in the plastic parts of these products break down, they add to the often toxic microplastics now found in waterways and on land in much of the world. Experts says stemming the tide of microplastics will likely require significant actions by industries that use plastics and lifestyle choices by people who use products containing plastics.