|For students and practitioners of complementary and alternative therapy everywhere.|
Particulate Matter by Jane Thurnell-Read
What's in the air apart from obvious things like pollens?
Particulate matter are airborne microscopic particles. There are two groups which are categorised according to size: PM10 and PM2.5.
PM10 are particles of less than 10 micrometres but more than 2.5 micrometres. These originate from smoke, dirt and dust from industry, vehicle exhaust fumes, pollens and moulds.
PM2.5 (less than 2.5 micrometres in size) comes from heavy metals and toxic organic compounds produced by industry. PM2.5 can travel further than PM10 because they are lighter.
Both of these types of particles can be inhaled, and almost everyone will have some of these particles in their lungs.
In a study in New York of 3000 autopsies half had asbestos particles in their lungs. Volcanic dust has been shown to travel thousands of miles from the original site.
Particles larger than 10 micrometers are usually sand and dirt blown by winds from roadways, fields, and construction sites.
Makes you think, doesn't it?