Meet Archishman Dey, the Ohio eighth-grader who tested an air fryer, candle, humidifier, gas and incense; incense produced the most fine-particle pollution

An eighth-grader from Solon, Ohio, is drawing attention to an often-overlooked source of air pollution - the air inside our homes. Archishman Dey , a student at Solon Middle School, conducted a science project examining how common household activities affect levels of PM2.5 , or fine particulate matter measuring 2.5 micrometres or less in diameter.

His experiment tested five everyday sources - an air fryer , candle , humidifier , natural gas and incense . Of these, burning an incense stick produced the highest level of PM2.5 in his experiment.