High summer temperatures combined with air pollution can cause ground-level ozone to form, which has serious effects on health, especially for older people or children, or those with asthma and other breathing problems. The European Environment Agency (EEA) presents some useful information on protecting your health from ground-level ozone this summer.
To date, the highest concentrations of ozone this
summer were on 25 and 26 July in the afternoon and evening. Belgium, western
Germany, the Paris region and northern France as well as the north of Italy
were particularly affected.
Excessive ground-level ozone can cause breathing
problems, trigger asthma, reduce lung function and cause lung diseases. The
mortality rate rises with increases in ozone exposure, according to several European
studies. Unlike ozone in the stratosphere, which protects us from
ultraviolet radiation, high levels of ground-level or ‘tropospheric’ ozone can
also damage plants, reducing crop yields and forest growth, and also damage
buildings and monuments.
Ground-level ozone is not directly emitted into the
atmosphere but is formed from chemical reactions following the release of
various ‘precursor pollutants’ from a wide variety of sources: for
example, fossil fuel combustion, road transport, refineries, solvents,
vegetation, landfills, wastewater, livestock, and forest fires.
The reactions that create ozone are catalysed by
heat and sunlight – so it is a particular problem in the summer months, and
southern Europe typically has much higher levels of ozone than the north.
safe from poor air quality
You can find up-to-date information on ground level
ozone concentrations across the pan-European region at the EEA’s Ozone Web.
The site gives hourly ground level ozone concentrations for the current
situation and recent episodes, based on up-to-date measured air quality data.
The website provides data from around 2 000 monitoring sites, allowing anyone
to check air quality in a specific region or across Europe.
Children, the elderly, asthma sufferers and others
with respiratory illnesses are most vulnerable. If ozone levels are very high,
it is advisable for these groups to avoid spending a lot of time outdoors.
Ozone levels are usually higher in the afternoon, so vulnerable people may
avoid the higher levels of pollution by working or exercising outdoors in the
mornings or evenings.
Europeans exposed to ozone pollution
Although emissions of precursor pollutants have
fallen in recent years, the level of ground-level ozone pollution in the air is
still quite high. Seventeen per cent of the EU urban population lives in areas
where the EU ozone target value for protecting human health was exceeded in
2010. More worryingly, more than 95 % of the total EU urban population is
exposed to ozone levels above World Health
Up to 69 % of agricultural crops in EEA member
countries were exposed to ozone levels in excess of the EU target value for
protecting vegetation from 2001 to 2009 (EEA
core set indicator 005).
Air pollution, including ozone, also has economic
costs. A recent
study by the EEA found that the air pollution released by the 10 000
biggest industrial facilities in Europe cost up to €169 billion in 2009. This
was calculated by adding the cost of poor health, premature death and crop
damage caused by ground-level ozone and other pollutants including fine
13 August, 2012.