Clean Air Act 1956
|Clean Air Act 1956|
|Parliament of the United Kingdom|
|An Act to make provision for abating the pollution of the air|
|Introduced by||Gerald Nabarro|
|Smoke Nuisance Abatement (Metropolis) Acts 1853, 1856, Public Health (London) Act 1891, Clean Air Act 1993, Clean Air Act 1968|
|Introduced a number of measures to reduce air pollution, especially by introducing 'smoke control areas' in some towns and cities in which only smokeless fuels could be burned|
The Clean Air Act 1956 was an Act of the Parliament of the United Kingdom enacted principally in response to London's Great Smog of 1952. It was sponsored by the Ministry of Housing and Local Government in England and the Department of Health for Scotland, and was in effect until 1993.
The Act introduced a number of measures to reduce air pollution, especially by allowing the introduction of "smoke control areas" in towns and cities in which only smokeless fuels could be burned. By shifting domestic sources of heat towards cleaner coals, electricity, and gas, it reduced the amount of smoke pollution and sulphur dioxide from household fires. Reinforcing these changes, the Act also included measures to prevent the emission of dark smoke from chimneys; required new furnaces to be smokeless; and that grit and dust should be minimised.
The Act was a significant milestone in the development of a legal framework to protect the environment.
The Act was repealed by the Clean Air Act 1993 which consolidated its legislation with other related enactments, including the Clean Air Act 1968.
London had seen a succession of acts and rules over the centuries to improve its air—such as the Smoke Nuisance Abatement (Metropolis) Acts 1853 and 1856 and the Public Health (London) Act 1891. However, despite the link between air pollution and health being well understood by the late 19th century, such efforts had not proven to be effective public health measures.
The Great Smog
When the "Great Smog" fell over the city in December 1952 the effects were unprecedented: 4,000 people are thought to have died in the immediate aftermath, raising public concern, with fog so thick it stopped trains, cars, and public events. A further 8,000 died in following weeks and months.
It was apparent that pollution was a real and deadly problem, and the smog's effects were a notable milestone in the modern environmental movement.
The Beaver Committee
The government appointed a committee chaired by the civil engineer Sir Hugh Beaver to investigate the issues. It reported in 1954 on the social and economic costs of air pollution and stated that clean air was then as important as clean water had been in the mid-nineteenth century. The committee proposed that domestic coal should be replaced by coke, and that greater reliance should be placed on other ‘smokeless’ fuels such as electricity and gas. Yet, each of the industries that produced smokeless fuels: coke and gas works and electricity generating stations burned coal to produce the ‘smokeless’ fuel. For example, the six million tons of coal a year that were converted to coke in North-East England in the late nineteenth century emitted some two million tons of volatile matter such as carbonic and sulphurous acid; this was an example of the transfer of pollution from the consumer to the producer.
The electricity industry
The electricity generating industry was a major consumer of coal and contributor to atmospheric pollution. The Beaver committee used the example of the recently commissioned Bankside power station in London to recommend the widespread adoption of flue-gas desulfurization for all new power stations in urban areas. It claimed that this would be practicable and cost effective if it added no more than 0.06 d. to 0.07 d. to the cost of a unit of electricity (1 kWh). The British Electricity Authority was sceptical about the benefits of desulfurization and challenged the committee’s recommendations and stated that this ‘strikes a damaging blow against the economy of electricity development in this country’ and that the financial implications ‘are potentially more serious than those of any previous restrictions or control imposed upon the Authority’s activities’. The Authority claimed that installing plant in all power stations would entail an annual capital investment of £10 million and would increase the cost of electricity by 0.1 d. per kWh and therefore exceeded the cost-effectiveness criterion suggested in the draft Beaver report. The British Electricity Authority was also critical that the Beaver committee had made no serious attempt to assess the relative economics of different ways of reducing atmospheric pollution. It claimed that burning coal in modern power station boilers that were equipped with efficient grit collectors and into tall chimneys was ‘an extremely efficient method of controlling pollution in terms […] of capital outlay’.
Clean Air Act 1956
The Government initially resisted pressure to act, and was keen to downplay the scale of the problem due to economic pressures. It took moves by backbench MPs (including Conservative member Gerald Nabarro, its sponsor) to pass a Private Member's Bill on domestic coal burning to persuade the Government to support a change in the law. The Clean Air Act built on earlier efforts to regulate pollutants, particularly in London, where air quality had long been poor.
The 1952 smog gave a momentum for tougher action: as well as the Clean Air Act, its effects also led to the introduction of the City of London (Various Powers) Act of 1954, and later by the Clean Air Act 1968. By prohibiting what had been the hitherto widely accepted actions of private households, the Clean Air Act 1956 had important implications for the debate about public regulation, public health, and the sphere of legitimate Government intervention.
Smog and its health effects continued to be a problem in London. During the London fog of 2–5 December 1957 smoke and sulphur dioxide concentrations reached levels comparable to 1952 and there were 760–1000 deaths. Another episode in 1962 resulted in 750 deaths.
The provisions of the 1956 Act were extended by the Clean Air Act 1968. The 1968 Act made it an offence to emit dark smoke from a chimney; empowered the minister to define limits for emissions of grit and dust from furnaces; defined requirements for arrestment plant to be fitted to new furnaces; and provided a framework for control of the height and position of chimneys. The Act also allowed the Minister to create smoke control areas and introduce controls on unauthorised fuel in such areas.
The 1956 and 1968 Clean Air Acts were repealed by the Clean Air Act 1993 which consolidated and extended the provisions of the earlier legislation.
- Clean Air Act (disambiguation)
- Fog Investigation and Dispersal Operation (FIDO) – an invention to clear fog from airfields
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- Clean Air Act and air legislation at NetRegs.gov.uk