Other duties of Richmond's City Clerk include assisting the Mayor with appointments, telephone calls and clerical work as needed. Also the City Clerk is the bridge between executive and legislative, between both of these and component government units, and between all of these and the public they are pledged to serve.
A micron is a unit of linear measure in the metric system used to measure distance from one point to another. The particles and contaminants that we are trying to filter out are far smaller than can be seen with the naked eye, magnifying glass or even a low powered microscope.
The term fine particles, or particulate matter 2.5 (PM 2.5), refers to tiny particles or droplets in the air that are two and one half microns or less in width. Like inches, meters and miles, a micron is a unit of measurement for distance.There are about 25,000 microns in an inch.The widths of the larger particles in the PM 2.5 size range would be about thirty times smaller than that of a human hair.ike inches, meters and miles, a micron is a unit of measurement for distance. There are about 25,000 microns in an inch. The widths of the larger particles in the PM 2.5 size range would be about thirty times smaller than that of a human hair.