The Air We Breath
Here is a picture of the actual air we breath; it was assembled by the Max-Planck-Institut für Chemie in Mainz/Germany
What we have are
Biological objects (pollen and such) in the first two rows and middle of the third row.
A silica particle (from the desert?); left third row; and an unknown particle right, third row.
Ash particles in the fourth row.
anorganic salt crystals (we think) in the fifth row .
.
With frame
5.3.1 Cleanrooms, Particles and Contamination
© H. Föll (Electronic Materials - Script)