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First "summer smog" of 2009 warning The warm, sunny, weather across England and Scotland led to the first summer smog episode of 2009. Moderate ozone levels were recorded for much of the UK.  Weather conditions suggested that ozone concentrations  reached HIGH pollution levels in rural parts of the East, South-East and South Coast of England.  Ozone reached MODERATE levels across the rest of the United Kingdom. Some people are more sensitive to ozone than others and may begin to notice an effect on their breathing. People with asthma are not necessarily more sensitive but, if affected, can use their 'reliever' inhaler. The public are being urged to take sensible precautions: Avoiding exercise outdoors in the afternoon can reduce exposure to ozone. Avoiding making unnecessary short car  journeys wherever possible can reduce the formation of ozone. Regular updates on levels of particulate matter (PM10), sulphur dioxide, nitrogen dioxide, ozone and carbon monoxide are available on TELETEXT (page 156), the Air Quality Information Archive at www.airquality.co.uk and Defra's freephone helpline (0800 556677), which also offers health advice to those who may be particularly sensitive to air pollution. Air Quality Measurement and Forecasts Air pollution is described as "Low (1-3)", "Moderate (4-6)", "High (7-9)" or "Very High (10)" The classifications were chosen on the basis of effects on health and are based on the latest medical and scientific research. Full details of the bands for all the pollutants are available on the Defra website. In addition to the sources of air quality information described in the press release, the information and the air pollution forecast is also sent by e-mail, free of charge, daily to a variety of outlets including regional and national newspapers, television and radio stations, environmental groups, local authorities, and international organisations (e.g. RIVM in the Netherlands). If you would like to be added to this individual service, ring the Government's contractors at AEA Energy & Environment (Paul Willis on 0870 190 6602) Health Advice The following advice on health applies when air pollution is "high" or "very high" "During episodes of air pollution experienced during the summer in the United Kingdom, levels of ozone, nitrogen dioxide and particles may be raised. Most people will experience no ill effects. Those suffering from lung diseases (including asthma) particularly if elderly should be aware that their symptoms might worsen. They may need to consider modifying their treatment as they usually do when symptoms increase, consulting their doctor if this is not effective. People who have noticed in the past that their breathing is affected on hot, sunny days should avoid strenuous outdoor activity, particularly in the afternoon. Children with asthma should be able to take part in games in the usual way, although they may need to increase their use of reliever medicines before participating. There is no need for them to stay away from school. Those suffering from a heart condition and who notice a change in their symptoms should get medical advice as they normally would."