New study details non-emission particulates

Greenhouse gas emissions from vehicles deserve a lot of attention, but particulates from vehicles are also a significant health concern. Tiny soot particles can be inhaled deeply into the lungs. Larger-sized particles can contaminate nearby fields and groundwater, and deliver a significant dose of microplastics to surface waters. Of the microplastic particles polluting surface waters, 30 percent originate from tire wear, according to new research by German and U.S. scientists.