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" ... Altogether, the ultra-flexible material is less than 50 micrometers thin, which is in the ballpark of a human hair. Moreover, the material is adaptable, and can emit heat when needed to match its surroundings. ... "
" ... Every stool sample ended up having microplastics in it with a median of 20 microplastic pieces per 10 grams of stool. The microplastic pieces ranged from 50 to 500 micrometers in size. The researchers also found nine different types of plastics with polypropylene and polyethylene terephthalate being most common. Yes, plastics aren't just present in North Shore High School, the setting for the movie Mean Girls. They were present in the intestines of all eight volunteers. ... "
" ... Once the BC formed, the researchers sprayed an aerosol consisting of tiny glass bubbles, less than 200 micrometers in size, onto the surface. When mixed with the BC, the glass bubbles created a hydrogel. For the final layer, the team added carbon nanotubes — cylindrical molecules formed from carbon atoms. ... "
" ... The researchers found fragments smaller than 300 micrometers up to 750 micrometers in length. Not only did 249 fragments land in a square meter, but they found other types of microplastics, including 73 films and 44 fibers deposited every day within a square meter. Intensity, rather than duration, of rainfall or snow events were more important to the amount of microplastics deposited. ... "
" ... To measure the cognitive decline of the 25,000 participants, each was given both verbal and math tests several times a year and correlated to their exposure to air pollution. As a proxy for general air pollution, the team measured sulfur dioxide, nitrogen dioxide, and other particulates that are smaller than 10 micrometers. While the study didn't find the exact mechanism in which pollution causes cognitive decline, they minimized other variables through several, long-term assessments across a wide population. ... "