what are the causes of human pollution
Answers
Answer:
The burning of fossil fuels, in both energy plants and vehicles, releases massive amounts of carbon dioxide into the atmosphere, causing climate change. Industrial processes also emit particulate matter, such as sulfur dioxide, carbon monoxide and other noxious gases.
Combustion from Industry
Almost all of the common air pollutants can be produced by industrial processes. Some of these are produced by combustion of fossil fuels that drive the industrial process, resulting in particulates, ozone and nitrogen oxides.
Transportation Emissions
Common forms of transportation like cars, planes and ships generally use combustion to harness energy from fossil fuels. The combustion process releases pollutants into the air, such as particles and carbon monoxide, and also releases substances that quickly form into nitrogen oxides and ozone, which are important air pollutants.
Agriculture Side-Effects
Farmers use machinery driven by fossil fuels to plow fields and harvest produce, and the animals that are raised in bulk for food also produce their own type of air pollution. Methane is a gas that contributes to the greenhouse effect that allows global warming; it arises from intestinal gas released by livestock.
Home Heating
Keeping homes warm is commonly the job of fossil fuels such as oil, gas and coal. Their combustion means that heating is an important source of air pollutants like sulfur dioxide. If electricity is used to heat the house, the energy plants that produced it may also have been driven by fossil fuels.
Home Cooking
The energy used in cooking may have come from energy plants, in which case the potential for air pollution has arisen earlier. Alternatively, such as in developing countries, home cooking requires direct burning of wood or coals, which produces the particulate pollution at the point of use.
Volcano Eruptions
Sometimes people think of air pollution as entirely man-made. In fact, natural processes release lots of substances into the air that are classed as pollution. Sulfur dioxide is a major modern air pollutant, and according to National Geographic, volcanoes can release enough sulfur dioxide into the air to influence global cooling.
Forest Fires
Forest fires release pollutants into the air in the same way as fireplaces burning wood produce pollution. They produce fine smoke particles, which, according to the EPA, are small enough to be able to get into the lungs and damage the lungs and the heart.
Tobacco Smoke
In the developing world, homes may have visible smoke coming from the fire that is used to cook and heat the home. In the developed world, tobacco smoke is commonly the only visible type of air pollution inside the house. Both types of indoor smoke are linked to respiratory diseases.
Metal Smelting
Specific industries produce particular air pollutant profiles, and the major source of metal pollution like lead is metal smelting, although niche uses of lead, such as in the manufacture of certain aviation fuels, also contribute.
Aerosols and CFCs
Chlorofluorocarbons (CFCs) in aerosols were a major cause of ozone layer destruction, and their production was banned in the United States in 1995. Despite such bans worldwide, the U.S. National Library of Medicine says CFCs can last for a century in the atmosphere, where they continue to do damage. The ozone layer helps shield the planet from dangerous ultraviolet rays.
Energy Sources
Factories need an energy source to power their production processes. In the United States, this has been electricity generated by fossil fuel burning, in particular coal. Air pollutants emitted by coal-fired power plants include nitrogen and sulfur oxides, hydrogen chloride and hydrogen fluoride gases, and arsenic, lead and other metals. Power generation for factories may cause greater air pollution than the factory processes. Natural gas is the least polluting fossil fuel for power generation. It emits nitrogen oxides and carbon dioxide on burning but in far lower quantities than coal
Metal Smelting
Metals provide machine components, vehicles, instruments and infrastructure in factories. Metal smelters that process and refine mineral ores and scrap metal create silica and metallic dusts during initial crushing and grinding. Heating and smelting processes produce emissions of sulfur and carbon oxides. Aluminum smelting can emit arsenic particulates, while lead and gold refining produces mercury and cyanide emissions.
Petrochemical Smog
Factory processes involve varied combinations of cleaning, painting and heating, while other raw material or appliance treatments release volatile organic compounds into the atmosphere. These are carbon- or hydrocarbon-based chemicals that quickly evaporate in the air. In the presence of sunlight, they react with other air pollutants like sulfur or nitrogen oxides from vehicle exhausts to create peroxyacetyl nitrates, commonly known as photochemical smog. This looks like a thick brown haze and can linger for days or weeks over urban centers.
Answer:
These are largely the result of human reliance on fossil fuels and heavy industry, but can also be due to the accumulation of waste, modern agriculture, and other man-made processes. The combustion of fossil fuels like coal, petroleum and other factory combustibles is a major cause of air pollution..