In May 2014, the World Health Organisation declared New Delhi as the most polluted city in the world. Delhi air had PM2.5 concentrations of 153…
Tag: POLLUTION
Air filtration scarf patented
PATENT INFORMATION: Patent No: US 9,095803 Patent Title: Neck-worn air filtration device Inventors: Augustine; Scott D. (Bloomington, MN), Albrecht; Mark C. (Minneapolis, MN), Arnold;…