Apart from the “four freedoms” described by President Rosevelt, freedom of Expression, freedom of religeon, freedom from fear and freedom from want, it occurs to me that we need to add frredom to experience clean water, and clean air. Mrs Thatcher privatised water companies, and helped the pension funds with their income generation, and if she could have privatised the air we breathe she would have. They have polluted all our rivers, and pose great long term health risks to us and our successors. They will take decades to clean up, and they come “top” (bottom) of my hierarchy of needs as they are physiological .
2022: The Times view on the link between pollution and dementia: Clear the Air – New research shows toxins from traffic are a major contributor to dementia as well as other debilitating or fatal conditions. The next prime minister must toughen up the law
2024: Clean the air: Scientists raise the alarm as air pollution is linked to dementia
Scientific advisers to the government have urged ministers to set tougher limits on air pollution after a landmark report found that it probably contributes to causing dementia.
The Committee on the Medical Effects of Air Pollutants (Comeap), an independent panel of experts, reviewed 70 previous studies and concluded it was “likely that air pollution can contribute to a decline in mental ability and dementia in older people”.
The experts believe that polluted air causes damage to the blood vessels in the brain. In turn this can cause vascular dementia, which is estimated to affect about 150,000 people in Britain. A further 700,000 people have other forms of dementia, such as Alzheimer’s, where links to air pollution are less clear.
Professor Frank Kelly, the Comeap chairman, said the government should “absolutely” adopt stricter targets on the most dangerous type of air pollution, known as PM2.5, based on guidance by the World Heath Organisation (WHO).
PM2.5 is formed of airborne particles with a diameter less than 2.5 micrometres, about a twentieth of the breadth of a human hair. The WHO has called for an average annual exposure not above 5 micrograms per cubic metre, but the government has proposed 10 micrograms per cubic metre for England by 2040. The Environment Act requires a target to be set by the end of October.
Professor Nick Fox, director of the Dementia Research Centre at UCL and one of the authors of the new report, said: “Inaction now will cost people the ability to live independent, healthy lives in years to come . . . The evidence is very strong that exposure to air pollutants is likely to increase your risk of dementia, possibly decades later.”
The Clean Air for All campaign, launched by The Times in 2019, has called for limits based on WHO recommendations. At present, regulations set a limit five times higher, at 25 micrograms.
Sir Andrew Goddard, president of the Royal College of Physicians, said that the type of studies on which the new report is based cannot prove a causative relationship between air pollution and dementia. But he added that they contributed to a growing body of evidence suggesting a link.
He has called for a PM2.5 target of 10 micrograms per cubic metre to be met by 2030, and for 5 micrograms by 2040. “It’s based on the government’s own projection that they could probably get down to 11 by 2030,” Goddard said.
Eight medical royal colleges, including the Royal College of Physicians, said last month that limits proposed by ministers would “fall far short of the level required to improve health and save lives”.
Steps that could reduce PM2.5 would include eliminating fossil-fuel power stations, reducing wood burning in homes, and removing old vehicles. Professor Alastair Lewis, of the University of York, said that meeting WHO targets would be challenging, especially in the southeast of England, which is affected by air pollution from the Continent. He added: “The report adds more evidence on the wide range of effects that air pollution has on public health . . . It’s something that accumulates inside us all over the long term.”
The Department for Environment, Food & Rural Affairs said: “Air pollution at a national level continues to reduce significantly, with nitrogen oxide levels down by 44 per cent and PM2.5 down 18 per cent since 2010, although we recognise we need to go further.”
It has estimated that achieving the targets proposed by ministers would result in up to 214,000 fewer cases of cardiovascular disease, 56,000 fewer strokes, 70,000 fewer cases of asthma and 23,000 fewer cases of lung cancer over 18 years.
The Times manifesto for clean air — revisited
In 2019 The Times launched its Clean Air For All campaign and set out a manifesto of what needed to be done. Here we revisit those demands — and update what has been achieved.
1. A new Clean Air Act to confer a legal right to unpolluted air for everyone in the UK
The first Clean Air Act, introduced in 1956 in response to the Great London Smog, was a world first. Britain has since lost its mantle of world leader in tackling air pollution. A new act should adopt tighter limits based on World Health Organisation guidelines and give local authorities powers and resources to tackle pollution.
2. Pollution monitors in every postcode
When people are given precise and up-to-date information from live local monitors about the level of air pollution near by, they will be empowered to take action and hold politicians to account.
3. Extend temporary traffic bans outside schools
Children at almost 400 schools in London are protected from air pollution by temporary traffic bans. The growth in “school streets”, where cars are banned at drop-off and pick-up times, was a victory for our campaign, but must go further. All vehicles except buses should be banned from roads beside all schools for 45-60 minutes in the morning and afternoon. The ban, which would not apply to main roads, can be enforced by number-plate recognition cameras. More children will walk, reducing both obesity and road accidents.
4. Extend low-emission zones in cities
London and Birmingham led the way with charges on the most polluting cars. Since our manifesto was published, more cities, including Bath and Portsmouth, have introduced levies. Others will follow suit this year, such as Bradford (September) and Bristol (November).
More can be done. Local authorities should introduce measures to disincentivise the use of polluting vehicles in city centres. Those introducing pay zones should ensure they cover all classes of vehicles.
5. Our 2019 manifesto called for a ban on sales of new diesel and petrol cars from 2030
The government acted on this in 2020, putting Britain on course to be the fastest G7 country to decarbonise cars and vans. We applaud this. Grants for electric cars have been scrapped since, however, and should be reintroduced. A push to install chargers is needed if the 2030 deadline is to be achieved.
How badly does air pollution harm health?
It causes 40,000 early deaths a year, according to a 2016 report by the Royal College of Physicians. There is evidence that it causes dementia, heart disease, lung cancer and respiratory conditions including asthma. A government panel has confirmed the link with dementia after a review of 70 studies. A 2018 study in The Lancet said 60,000 of the 209,600 new cases of dementia a year could be due to poor air quality.
Why does air pollution cause dementia?
Tiny particles seep into the bloodstream and damage blood vessels in the brain, reducing the supply of oxygen to brain cells. In rare cases, they may enter the brain directly after being breathed in, causing inflammation linked to dementia.
And other diseases?
Breathing in pollutants can damage the blood vessels by making them narrower and harder, increasing the likelihood of clots, abnormal heart rhythms and heart attacks. Half of those with asthma say toxic air triggers their symptoms, according to Asthma + Lung UK. Air pollution was listed as a cause of death for the first time in the UK after Ella Adoo-Kissi-Debrah suffered a fatal asthma attack in 2013 after being exposed to excessive pollution from vehicle exhausts. The brains of children are particularly susceptible.
What is the government doing?
It has set a target to curb levels of the most harmful pollutant, PM2.5, by 2040, but the limits proposed by the government are not as tough as those recommended by the WHO. Scientists and doctors say the stricter WHO guidelines should be adopted.
What is the role of individual councils?
The government sets pollution limits but local councils enforce them with initiatives such as low-traffic areas, fines for wood burning and speed limits.
How can I mitigate air pollution?
Avoid hotspots such as busy roads or junctions. Travel before rush hour, when pollution levels rise, and walk or cycle on back streets.