This room was off-limits to smokers, but its air contained surprising amounts of 'thirdhand smoke'

Pop quiz: If you sampled the air in an empty college classroom where smoking is not permitted, what is the last thing you ’d expect to find?If you guessed “cigarette smoke,” you’re in good company.Peter DeCarlo, an air quality researcher at Drexel University in Philadelphia, would have agreed...

Source: Los Angeles Times - Science - May 9, 2018 Category: Science Authors: Karen Kaplan Source Type: news