Brian Barton
Pollution has been a problem since the earliest ancestors of humans first appeared. However, the worst period of pollution in human history is likely to have occurred during the Industrial Revolution, which began in the early 1800s. During this time, the rise of mechanised factories, chemical manufacturing, and the increased use of coal and steam power led to unprecedented levels of air and water pollution. Cities became the primary sources of pollution due to the burning of coal and wood, and the concentration of human and animal waste. This resulted in severe health issues, with air pollution recognised as a threat to human health as early as 400 BC by Hippocrates. In modern times, pollution continues to be a significant issue, with the meat, dairy, and textile industries being some of the largest contributors to environmental pollution.
| Characteristics | Values |
|---|---|
| Time Period | The worst period of pollution was during the Industrial Revolution |
| Locations | London, Berlin, Cuyahoga River, Donora, Lake Karachay, Chelyabinsk, Russia |
| Causes | Burning of coal and wood, horses in concentrated areas, industrial waste, sewer systems, population growth, oil and coal, nuclear science, meat and dairy industries, textile industry |
| Effects | Water and air pollution, disease, death, environmental degradation, climate change |
| Attempts to Address | Legislation and regulation, international agreements, pollution control, clean air laws, grassroots activism |
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What You'll Learn
Industrial Revolution
The Industrial Revolution, which began in the mid-18th century, introduced new technologies that led to faster production and consumption of materials. This revolution was a key period in the history of environmental pollution, giving birth to environmental pollution as we know it today. The use of powerful sources of energy, such as coal, transformed societies and their economies, but also had severe environmental consequences.
The burning of coal and wood, coupled with the presence of many horses in concentrated areas, made cities the primary sources of pollution. The coal-powered steam engine, a key contribution to the Industrial Revolution, released emissions into the atmosphere. This led to thick blankets of smog covering industrial cities and causing health issues such as respiratory illnesses for residents and harm to wildlife. The air pollution from factories also damaged property, leading to the Smoke Nuisance Abatement Act of 1821 in Britain.
Waterways were also heavily polluted during the Industrial Revolution. Oil spills and pollutants entering rivers, streams, lakes, and oceans led to widespread losses of wildlife and outbreaks of diseases in humans. Improper disposal of sewage, debris, oil, and other waste drained into waterways, causing water quality issues. London recorded one of the earliest extreme cases of water pollution with the Great Stink on the Thames in 1858, which prompted the construction of the London sewerage system.
The overcrowding of cities during the Industrial Revolution also led to unhealthy living conditions and filth in the streets. The mass migration of populations from the countryside to the fast-growing towns and cities resulted in epidemics of cholera, typhoid, and other diseases. The impact on the health of urban populations from waterborne and air-borne diseases was devastating, particularly for working families living close to industrial sources.
The Industrial Revolution set in motion a process of environmental degradation that continued well after its conclusion. Even with the subsequent development of environmental regulations and international agreements, the world continues to grapple with the legacy of this period of intense pollution.
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Water pollution
In the 20th century, water pollution continued to worsen, with outbreaks of waterborne diseases, degradation of fishing and recreational waters, and rapid industrial development and population growth. This prompted a new appraisal of water pollution control, and cities had to implement large capital improvement programs to address the issue. However, ineffective regulation and overlapping authority among regulatory agencies hampered these efforts.
One of the most notable incidents of water pollution occurred in 1969 when the Cuyahoga River in Ohio caught fire due to chemical waste, symbolising years of environmental neglect. This incident spurred grassroots activism and led to the creation of federal legislation aimed at addressing water pollution. Despite these efforts, water pollution remains a critical issue today, with industrial waste, agricultural runoff, and sewage treatment failures continuing to contaminate water sources.
In recent years, there have been several significant water pollution incidents, including the Deepwater Horizon oil spill in 2010, considered the largest marine oil spill in the history of the petroleum industry, and the Kingston Fossil Plant coal fly ash slurry spill in 2008, which released 1.1 billion gallons of coal ash into the Emory River. These incidents have had lasting impacts on water quality, ecosystems, and public health. Additionally, urban areas continue to affect water quality through increased runoff and pollutant loads, and industrial processes contribute to water pollution through the release of chemicals and waste.
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Air pollution
The Industrial Revolution, which began in the 19th century, marked a significant turning point in the history of air pollution. The transition to new manufacturing processes, including the rise of mechanized factories, chemical manufacturing, and increased use of coal and iron, led to a surge in air pollutants. Industrialized cities in Europe and the United States experienced waste from industries and factories, with rivers and waterways contaminated by industrial chemicals and waste. Despite growing concerns about the health impacts of coal smoke, rapid industrialization and the increasing use of coal continued to fuel air pollution.
In the 20th century, air pollution became an even more pressing issue, particularly in highly industrialized cities. The Donora smog disaster in 1948, which asphyxiated 20 people and made more than 7,000 seriously ill, and the London killer fog of 1952, highlighted the deadly consequences of air pollution. These events spurred the creation of the Air Pollution Control Act of 1955 in the United States, marking the first federal attempt to control air pollution.
Since then, clean air legislation has been strengthened, with acts such as the Clean Air Act of 1990 setting limits on the discharge of air pollutants from industrial facilities and motor vehicles. These laws have significantly reduced pollution levels, and grossly contaminated air is much less common today than it was 50 years ago. However, air pollution remains a serious issue, particularly in low and middle-income countries, where it is a leading risk factor for death and contributes to various health issues, including heart disease, respiratory infections, and lung cancer.
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Population growth
The impact of population growth on the environment can be observed through increased consumption of resources and the generation of waste. As the population grows, there is a higher demand for land, food, water, air, fossil fuels, and minerals. This increased consumption often leads to the extraction of resources from the environment, which can result in the release of pollutants and waste that degrade air and water quality and harm the health of humans and other species. For example, the burning of fossil fuels and industrial activities contribute to air pollution, with particulate matter (PM) being considered the main contributor to adverse health effects.
Additionally, population growth has led to rapid urbanization, with more people moving to cities in search of employment and opportunities. This urbanization has put pressure on resources such as water, energy, and food, and has contributed to localized environmental problems, including pollution from cars, heaters, and other modern conveniences. In developing countries, the influx of people to cities can exceed the pace of development, leading to the formation of slums, inadequate environmental regulations, and higher levels of centralized pollution.
Furthermore, population growth has implications for biodiversity and ecosystems. As the population increases, more land is needed for agricultural activities, urban expansion, and infrastructure development. This can lead to the destruction or disturbance of natural habitats, reducing species populations, geographic ranges, and biodiversity. It also increases the risk of transmitting diseases, as pathogens can spread more rapidly in densely populated areas, and transportation networks can facilitate their rapid spread to new regions.
While there are concerns that unchecked population growth will lead to an environmental catastrophe, the relationship between population growth and environmental issues is complex. For instance, while high-income and upper-middle-income countries contribute a significant proportion of global carbon dioxide emissions, their population growth rates have been stable or decreasing. On the other hand, low-income and lower-middle-income countries with rapid population growth may struggle to address environmental challenges due to limited resources and slow progress in development.
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Legislation and regulation
Federal legislation to address air quality in the US dates back to 1955, with the Air Pollution Control Act. This Act provided funds for federal research in air pollution but did not directly regulate pollution sources. The Clean Air Act of 1963 was the first federal legislation regarding air pollution control. It established a federal program within the U.S. Public Health Service and authorized research into techniques for monitoring and controlling air pollution.
The Clean Air Act Amendments of 1970 resulted in a major shift in the federal government's role in air pollution control. This legislation authorized the development of comprehensive federal and state regulations to limit emissions from both stationary (industrial) and mobile sources. Four major regulatory programs affecting stationary sources were initiated: the National Ambient Air Quality Standards (NAAQS), State Implementation Plans (SIPs), New Source Performance Standards (NSPS), and National Emission Standards for Hazardous Air Pollutants (NESHAPs). The Clean Air Act Amendments of 1970 were passed unanimously in the U.S. Senate and signed into law by President Richard Nixon on December 31, 1970.
The Clean Air Act was amended again in 1977 and 1990. The 1977 amendments included provisions to protect areas that still had clean air and tightened the rules around automobile emissions. The 1990 amendments represented a further shift in the way that the EPA regulated toxic air pollutants, with the adoption of new cost-effective approaches to reducing air pollution. These amendments also included provisions regarding stratospheric ozone protection and the control of acid rain.
The Clean Air Act is the United States' primary federal air quality law and is administered by the U.S. Environmental Protection Agency (EPA), in coordination with state, local, and tribal governments. The EPA develops extensive administrative regulations to carry out the law's mandates, with associated regulatory programs implementing these regulations. The Clean Air Act has been instrumental in dramatically reducing the country’s air pollution over the past few decades and continues to play an important role in protecting public health.
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Frequently asked questions
Outdoor air pollution has been recognised as a threat to human health since the time of Hippocrates, around 400 BC. However, the worst period of outdoor air pollution in modern history was likely during the Industrial Revolution, which began around 1820. The burning of coal and wood, as well as the presence of many horses in concentrated areas, made cities the primary sources of pollution.
Indoor air pollution has been a problem since early humans sought shelter and warmth from open fires, enhancing their exposure to toxic gases and particles. The development of the chimney in the 12th century improved indoor air quality in larger houses, but indoor air pollution continues to be a major problem, particularly in low-income countries.
Water pollution has been an issue since the Middle Ages, when unsanitary conditions caused by human and animal waste led to diseases such as cholera and typhoid fever. The Industrial Revolution further exacerbated water pollution, with industrial chemicals and wastes contaminating water sources. London's Thames River experienced one of the earliest extreme cases of water pollution in 1858, known as the "Great Stink."
Soil pollution has likely worsened with the growth of the textile industry, which uses thousands of chemicals in its supply chain and pollutes the environment with large amounts of microplastics and wastewater. The meat and dairy industries are also major contributors to soil pollution.
