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.
But it's important to be an informed buyer. First there is the question of fiber quality, which is measured in length and thickness. Fiber length ranges from 0.8 inch for cheap cashmere to up to 2.5 inches for the most luxurious. The diameter of the fiber must be less than 19 microns to be considered cashmere. In comparison, human hair has a diameter of 75 microns. Finer cashmere (often around 14 microns) is what's going into luxury garments. Thicker, shorter (scratchy) hair will be made into less expensive garments and is often used as part of a blend. These blends combine cashmere with wool, silk or synthetic fibers.