Periodontal treatment is the specialist cleaning of your teeth and gums to help control the bacteria that cause gum disease. Gum disease is caused by the germs (bacteria) which live in your mouth.
Ground-Level Ozone (O 3). Ground-level ozone is a colorless and highly irritating gas that forms just above the earth's surface.It is called a secondary pollutant because it is produced when two primary pollutants react in sunlight and stagnant air.round-Level Ozone (O 3). Ground-level ozone is a colorless and highly irritating gas that forms just above the earth's surface.
In the upper atmosphere 10-20 miles (20-30 kilometers) above ground, ozone acts as a shield to prevent some harmful ultraviolet rays from the sun reaching the ground. Low-level ozone is formed from reactions of petroleum-powered vehicles with volatile organic compounds (VOCs) found in gasoline and paint solvents.