The source of photochemical smog is motor vehicle exhaust, NO and VOCs, reacting with sunlight. Effects of Acid Deposition. More commonly called acid rain, acid deposition alters chemistry in soil and âmobilizesâ toxic metal ions to the soil, harming soil organisms by hindering their nutrient uptake.
The human hair IS APRROX 0.004' (four thousands of an Inch and there are 12 inches to the foot)So therefore .004 divided by 12 is your answer.
Micron. A unit of measure for the smallest of the small, One Micron is 0.001 mm or 0.00004 inch. A micron is really, really small. The width of a human hair is about 70 microns. Our eyes can see no smaller than 40 microns, and youâll need a decent microscope to see a particle 20 microns wide. Allergens like dust, smoke and bacteria are particulates that are often .3 microns or less. At that size, they can get deep into your lungs, because they arenât filtered well by your nose and throat.