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.
Ozone is a naturally-occurring gas that can be good or bad for your health and the environment. depending on its location in the atmosphere. In the layer near the Earthâs surfaceâthe troposphereâ. ground-level or âbadâ ozone is an air pollutant that is a key ingredient of urban smog. But higher up, in. the stratosphere, âgoodâ ozone protects life on Earth by absorbing some of the sunâs UV rays. An easy.