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High pollution hits southern England

_82231483_airpollutionlondonapFrom BBC

Parts of England have experienced very high levels of air pollution, following health warnings for vulnerable people.

Warm, still conditions combined with traffic fumes, pollution from Europe and Saharan dust from the south saw very high levels affect six regions.

Eastern and south-east England, the East Midlands, Greater London, west London, the West Midlands and Yorkshire and Humberside were all affected.

Parts of the UK have also experienced the hottest day of the year so far.

Areas of London saw the highest temperatures, with St James’s Park reaching 21.9C (71.42F), Kew Gardens 21.7C (71.06) and Heathrow Airport recorded at 21.3C (70.34).

_82237216_weather_gettyDefra said pollution could be dispersed by overnight Atlantic winds by Saturday.

It said that while no regions have reached the highest level of air pollution – rated as level 10 – six regions had recorded pollution levels of up to level 9.

In areas that experienced very high levels of air pollution, adults and children with lung problems, adults with heart problems and older people were advised to avoid strenuous activity.

People were also advised to avoid busy roads and those who carry a reliever inhaler, such as asthma sufferers were warned to always have it with them.

Dr Penny Woods, chief executive of the British Lung Foundation, said: “This latest high air pollution _82237220_ramsgate_reutersepisode, coming so soon after the last, is troubling, and could again put people living with respiratory conditions at risk of worsening symptoms.”

A Defra spokeswoman said: “This is expected to clear on Saturday and pollution levels will return to low throughout the morning.”

Professor Paul Monks, chairman of the Air Quality Expert Group, said air pollution is not taken seriously enough because it is an “invisible menace”.

“If they can’t see it they often don’t think about it,” he said.
A cover of haze obscured views of central London
Ramsgate and other locations on the South Coast were also affected by pollution

Ramsgate and other locations on the South Coast were also affected by pollution

_82208351_air_pollution_uk_fri_april2015_map624v3WHO air quality guidelines

“This episode at the moment is one of about a dozen episodes a year,” said Simon Birkett, founder of campaign group Clean Air in London.

“Day in day out the average levels of nitrogen dioxide on many roads in central London will tend on average to be the highest in the world.”

Air quality specialist Nigel Jenkins: “We suspect some air is coming in from the Sahara”

A case brought by environmental lawyers Client Earth against the government over levels of air pollution that breach European Union rules is shortly to return to the Supreme Court.

Philip Insall, director of health for cycling charity Sustrans, described the state of air pollution in Britain as “criminal” and a “national embarrassment”.

He said: “The next government will need to get a grip on air pollution.

“That will mean serious, dedicated investment and an effective programme of action to help more people out of their cars and choosing walking and cycling for short journeys.”

European Union rules set limits on the levels of pollutants in the air such as sulphur dioxide, nitrogen dioxide and lead.

_82229846_air_pollution_uk_sat_april2015_map624v3How concerning?

By James Gallagher, Health editor, BBC News website

Healthy people tend to notice air pollution as a dry throat, sore eyes or a tickly cough.

But it can have a more serious impact on health by being the trigger for a heart attack or by making asthma worse.

Even low levels of air pollution can harm the health of people who are particularly sensitive.

But on Friday pollution will hit “level 10” or “very high” – the highest category of air pollution in the UK.

It does not mean people need to stay indoors.

But it is the only category of air pollution at which at-risk people – those with heart or lung problems and the elderly – are told to completely avoid strenuous physical activity.

Even healthy people are told to cut down on the amount of physical exertion.

However, the pollution will be brief and levels will drop to low/moderate by Saturday.

What is meant by pollution?

Aside from the Sahara dust, the pollution is made up of various substances, including nitrogen dioxide, sulphur dioxide and ammonia.

These form particles in the atmosphere. The two most common measurements are particulate matter measuring 2.5 micrometres or less, known as PM2.5; and larger particles measuring 10 micrometres, known as PM10.

PM2.5 particles are thought to be particularly damaging because they are so small, they can penetrate into the deepest parts of the lungs.

They come primarily from vehicle exhausts.

For more on this story and video go to: http://www.bbc.com/news/uk-32233922

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