Good and bad ozone
Ozone occurs naturally at low concentrations throughout the Earth's
atmosphere. In the stratosphere, which extends from about 10 to 50 km
above the Earth's surface, ozone is 'good' as it protects life on Earth
from the sun's ultraviolet rays.
This is why the world is trying to stop the manufacture and use of substances that damage the stratospheric ozone layer.
In the troposphere, near the Earth's surface, human activities lead to ozone concentrations several times higher than the natural background level. Too much of this ground-level ozone is 'bad' as it is harmful to breathe and also damages vegetation.
For references, please go to www.eea.europa.eu/soer or scan the QR code.
This briefing is part of the EEA's report The European Environment - State and Outlook 2015. The EEA is an official agency of the EU, tasked with providing information on Europe’s environment.
PDF generated on 06 Mar 2015, 05:24 AM