Environmental pollution


  • Environmental contamination
  • Dependence on pollution
  • Degradation of the environment through contamination

Nature

Human activities inevitably and increasingly introduce material and energy into the environment; when that material or energy endangers or is liable to endanger man's health, his well-being or his resources, indirectly or directly, it is called a pollutant. A substance may be considered a pollutant simply because it is in the wrong place, at the wrong time, and in the wrong quantity.

Pollutants can affect man with direct effects such as: acute effects from exposure to a toxic pollutant reaching man through air, water or food; long-term effects due to prolonged exposure to a pollutant at levels lower than those giving rise to overt toxic effects; synergistic interaction between pollutants or between a pollutant and malnutrition or disease; genetic effects that are manifested in future generations. Indirect effects on man may result from reduction of the food supply or deterioration of the environment. Such effects include: damage to plants and animals; disruption of ecological cycles such that a previously harmless species becomes a pest; damage to the human habitat (air pollutants that destroy forests and corrode buildings); water pollutants that destroy the recreational value of inland waters; alteration of the global climate (this is considered to be a future threat).

Background

Air, water and food always contain, and always have contained, varying amounts of 'foreign' matter, and in this sense the potential for pollution has always been present. Furthermore, one of the most widespread and oldest forms of pollution is that arising from contamination of the environment by pathogenic organisms. The present world-wide concern about pollution arises from the realization that today's problems originate essentially from human activity and are very much greater in magnitude and far more widespread than ever before. For example, pesticides sprayed in the tropics evaporate from the soil and turn up at hight concentrations in the Arctic after condensing in the cold polar air.

Incidence

The emissions of sulphur and nitrogen oxides and concentrations of atmospheric ozone have increased, agricultural and industrial wastes have been accumulating, lake acidification has taken place, forests and water quality have been declining. The volume of garbage and waste is constantly increasing, due in particular to increases in population, changes in living habits, increases in packaging material and increases in consumption. The capacity of waste and garbage disposal installations has long been left far behind. Water resources are to an increasing extent being polluted by the constantly growing volume of waste water from households and industry. The river Vistula, which flows through Warsaw, annually disgorges into the Baltic Sea 5,000 tonnes of phosphorus, 90,000 tonnes of nitrogen, 130 tonnes of oil, three tonnes of phenol and lead, as well as unknown quantities of cadmium, mercury and zinc.

Technical progress and mechanization has in recent decades led to a rapid increase in noise. About every fifth worker in Germany is subjected to a noise level of 90 dB or over. The atmosphere is being polluted by dust, smoke and exhaust gases from industry, motor vehicles and domestic heating. In the former Soviet Union fifty million people live in areas where the air pollution levels are 10 times the minimum health standard. In the Urals the city of Nizhny Tagil, for example, industrial enterprises emit nearly 700,000 tons of poisonous substances into the air every year.

According to a recent study by the Lancet, and written by more than 40 international health and environmental experts, pollution killed an estimated 9 million people in the world in 2015.

"Pollution is the largest environmental cause of disease and premature death in the world today. Diseases caused by pollution were responsible for an estimated 9 million premature deaths in 2015—16% of all deaths worldwide—three times more deaths than from AIDS, tuberculosis, and malaria combined and 15 times more than from all wars and other forms of violence. In the most severely affected countries, pollution-related disease is responsible for more than one death in four."

Although air, water and noise pollution are not yet matters of primary concern in urban areas of developing countries, such problems will grow more severe as these countries move toward their goals of economic development. Generally the devices and regulations presently in force to control pollution in developed countries are not applied to industrial processes in developing countries with equal efficiency or stringency. In an effort to provide increased economic well-being, environmental safeguards are neglected. Water supplies are not only contaminated with human wastes, but grow increasingly toxic as they receive the effluent from expanding industries. Air pollution increases with the material well-being of the urban population and emanates from power plants, industry, space heating and the growing number of motor vehicles.

Claim

  1. Three factors determine the magnitude and nature of the pollution problem, whether at the local or global level: the size of the human population; the rate of production and consumption; and the level and use of technology. But while the total stress resulting from these factors is increasing, the capacity of the environment to deal with their side effects is decreasing. It is for this reason that pollutants must be controlled. Pollution of one sort or another occurs throughout human societies and the effects of any given pollutant are frequently the same wherever they are felt. The present situation results principally from the unbridled application of technology in industrialized countries. Developing countries, however, are already encountering the same problems and are increasingly having to deal with the same pollutants. During this century both population growth and rapid industrialization have combined to poison the atmosphere; contaminate lakes, rivers and even oceans; erode the soil; and destroy many forms of life in the developed countries. Pollution cannot be contained within national boundaries. Wind and rain, ocean currents, migrating birds and fish carry pesticides, inorganic nitrogen fertilizer, oil, and atomic wastes to the far reaches of our planet.

Narrower

  1. Water pollution
  2. Urban-industrial air pollution
  3. Trans-boundary pollution
  4. Retrospective pollution liability
  5. Radioactive contamination
  6. Pollution during military occupation
  7. Pollution by neurotoxins
  8. Polar pollution
  9. Pesticide hazards to wildlife
  10. Oil spillage
  11. Obliteration of footpaths by development
  12. Loss of biodiversity through pollution
  13. Light pollution
  14. Land pollution
  15. Lack of integrated pollution control
  16. Inhibition of crop growth by pollution
  17. Inadequate legislation against environmental pollution
  18. Health hazards of environmental pollution
  19. Havens for environmental pollution
  20. Governmental polluters
  21. Food pollution
  22. Environmental hazards of pharmaceutical products
  23. Electromagnetic pollution
  24. Domestic pollution
  25. Contamination of human body
  26. Chemical pollutants of the environment
  27. Bioaccumulation of toxic substances
  28. Air pollution
  29. Agricultural pollution
  30. Acidic precipitation
  31. Accumulated junk

Aggravated by

  1. Waste of non-renewable resources
  2. Urban slums
  3. Unsustainable economic development
  4. Unsafe hazardous waste disposal
  5. Unethical practice of chemistry
  6. Unethical industrial practices
  7. Underutilized agricultural wastes
  8. Uncertain toxicity thresholds
  9. Toxic metal pollutants
  10. Thermal pollution
  11. Suppression of information concerning environmental safety
  12. Sewage as a pollutant
  13. Pollutants
  14. Plastic pollution
  15. Mismanagement of environmental demand
  16. Methane gas emissions from landfill sites
  17. Lack of environmental accountability
  18. Inequality in distribution of energy resources among countries
  19. Industrial waste water pollutants
  20. Indiscriminate economic development
  21. Inadequate environmental education
  22. Inadequate domestic refuse disposal
  23. Hazardous wastes
  24. Environmental hazards of pesticides
  25. Environmental hazards of nuclear power production
  26. Environmental hazards of industrialization
  27. Dangerous substances
  28. Criminal offences against the environment


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