The Visigoths invaded Italy under Alaric I and sacked Rome in 410. After the Visigoths sacked Rome, they began settling down, first in southern Gaul and eventually in Spain and Portugal, where they founded the Visigothic Kingdom and maintained a presence from the 5th to the 8th centuries AD.
Hazardous Ozone-Generating Air Purifiers. This page last reviewed March 9, 2015. Not all air-cleaning devices are appropriate for home use â some can be harmful to human health. The ARB recommends that ozone generators, which are air cleaners that intentionally produce ozone, not be used in the home.Ozone is a gas that can cause health problems, including respiratory tract irritation and breathing difficulty (Ozone and Health).he ARB recommends that ozone generators, which are air cleaners that intentionally produce ozone, not be used in the home. Ozone is a gas that can cause health problems, including respiratory tract irritation and breathing difficulty (Ozone and Health).
However, ozone found in the troposphere, the layer of the atmosphere that extends from the earth's surface to about 10 miles up, is deemed ground level or bad ozone. At ground level, ozone is an air pollutant that damages human health, vegetation, many common materials, and is a key ingredient of smog. How Does Ground Level Ozone Form? (back to top) Ozone has the same chemical structure (O 3) whether it occurs miles above the earth or at ground level.