Advertisement

Taking measure of particulate matter
Text Size

Pollutant particles tiny enough to be inhaled deeply into the lungs, typically PM-2.5 and smaller, can’t be seen with the naked eye but collectively can contribute to hazy skies. The particles can grow in size as they collide and stick to others or become jacketed with other airborne chemicals. Smaller particles can ride air currents for days to weeks, traveling far — until washed out by rains. Credit: Courtesy of EPA Office of Research and Development; modified by A. Nandy


Comments

Please alert Science News to any inappropriate posts by clicking the REPORT SPAM link within the post. Comments will be reviewed before posting.

Registered readers are invited to post a comment. To encourage fruitful discussion, please keep your comments relevant, brief and courteous. Offensive, irrelevant, nonsensical and commercial posts will not be published. (All links will be removed from comments.)

You must register with Science News to add a comment. To log-in click here. To register as a new user, follow this link.

Advertisement
Reader Favorites:
seperator
SN on the Web:
seperator