Category: Education

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Presentation Transcript

Pollution : 

Pollution Made by Vivek Sharma VIII A Roll no. 39

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POLLUTION is the introduction by man into the environment of contaminants that contains harmful substances

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Air pollution : 

Air pollution Air pollution may be defined as the presence in the air (outdoor atmosphere) of one or more contaminants or combinations thereof in such quantities and of such durations as may be or tend to be injurious to human, animal or plant life, or property, or which unreasonably interferes with the comfortable enjoyment of life or property or conduct of business.

Can you imagine living in a Polluted and Smokey place? : 

Can you imagine living in a Polluted and Smokey place?

Air Pollutant : 

Air Pollutant It is a substance or effect dwelling temporarily or permanently in the air , which adversely alters the environment by interfering with the health, the comfort, or the food chain, or by interfering with the property values of people. A pollutant can be solid (large or sub-molecular), liquid or gas . It may originate from a natural or anthropogenic source (or both). It is estimated that anthropogenic sources have changed the composition of global air by less than 0.01%. However, it is widely accepted that even a small change can have a significant adverse effect on the climate, ecosystem and species on the planet. Examples of these are acid rain, ozone in the lower atmosphere, and photochemical smog.

Sulfur Dioxide : 

Sulfur Dioxide Ninety-five percent of pollution related sulfur oxide emissions are in the form of sulfur dioxide (SO2), a heavy, colorless gas with an odor like a struck match. This gas combines easily with water vapor, forming aerosols of sulfurous acid (H2SO3), a colorless, mildly corrosive liquid. This liquid may then combine with oxygen in the air, forming the even more irritating and corrosive sulfuric acid (H2SO4).

Other sulfur-containing compounds : 

Other sulfur-containing compounds Hydrogen sulfide (H2S) gas - rotten eggs. Mercaptans - skunk spray or decayed garbage. (Added in trace amounts to natural gas, providing a leak-detecting warning odor.) Note: The amount of SO2 released from coal fired power plants depends on the sulfur content of coal, normally 0.7% to 2% by weight. High sulfur coal sometimes contains as much as 6% sulfur by weight. In India, sulfur content is quite low.

Health Effects of Sulfur Oxides : 

Health Effects of Sulfur Oxides Sulfur dioxide not only has a bad odor, it can irritate the respiratory system. Exposure to high concentrations for short periods of time can constrict the bronchi and increase mucous flow, making breathing difficult. Children, the elderly, those with chronic lung disease, and asthmatics are especially susceptible to these effects.

Sulfur dioxide can also: : 

Sulfur dioxide can also: Immediately irritate the lung and throat at concentrations greater than 6 parts per million (ppm) in many people. Impair the respiratory system's defenses against foreign particles and bacteria, when exposed to concentrations less than 6 ppm for longer time periods. Apparently enhance the harmful effects of ozone. (Combinations of the two gases at concentrations occasionally found in the ambient air appear to increase airway resistance to breathing.)

Health Effects of Ozone : 

Health Effects of Ozone Ozone acts as a powerful respiratory irritant at the levels frequently found in most of the nation's urban areas during summer months. Ozone exposure may lead to: Shortness of breath. Chest pain when inhaling deeply. Wheezing and coughing. Long-term, repeated exposure to high levels of ozone may lead to large reductions in lung function, inflammation of the lung lining, and increased respiratory discomfort.

Sulfur oxides Effects on Plants : 

Sulfur oxides Effects on Plants Sulfur dioxide easily injures many plant species and varieties, both native and cultivated. Some of the most sensitive plants include various commercially valuable pines, legumes, red and black oaks, white ash, alfalfa and blackberry. The effects include: Visible injury to the most sensitive plants at exposures as low as 0.12 ppm for 8 hours. Visible injury to many other plant types of intermediate sensitivity at exposures of 0.30 ppm for 8 hours. Positive benefits from low levels, in a very few species growing on sulfur deficient soils.


WATER POLLUTION Water pollution is a large set of adverse effects upon water bodies such as lakes, rivers, oceans, and groundwater caused by human activities.

The sources of WATER POLLUTION : 

The sources of WATER POLLUTION Throwing trashes in water Throwing low batteries in water,lakes,rivers and etc. The chemicals from factories that might flow to rivers


NOISE POLLUTION Noise pollution or environmental noise is displeasing human or machine created sound that disrupts the activity or happiness of human or animal life. A common form of noise pollution is from transportation, principally motor vehicles. The word "noise" comes from the Latin word nausea meaning "seasickness", or from a derivative (perhaps Latin noxia) of Latin noceō = "I do harm", referring originally to nuisance noise.

“cause and effect ofNOISE POLLUTION” : 

“cause and effect ofNOISE POLLUTION” No one on earth can escape the sounds of noise- an unwanted, disturbing sound that causes a nuisance in the eye of the beholder. Noise is a disturbance to the human environment that is escalating at such a high rate that it will become a major threat to the quality of human lives. There are numerous effects on the human environment due to the increase in noise pollution. In the following paper, the cause and effects of noise pollution will be presented in some detail. Major sources of noise can be airplanes at takeoff and landing, and a truck just off the assembly line, yet we seem accept and enjoy countless other sounds, from hard rock music to loud Harley Davidson motor cycles. The following areas will be investigated in some detail; adolescent education, neural-effects, sleep, hearing damage, occupational environment, transportation, and physiological effects.


WASTE POLLUTION Waste, rubbish, trash, garbage, or junk is unwanted or undesired material. "Waste" is the general term; though the other terms are used loosely as synonyms, they have more specific meanings: rubbish or trash are mixed household waste and including paper and packaging; food waste or garbage (North America) is kitchen and table waste; and junk or scrap is metallic or industrial material. There are other categories of waste as well: sewage, ash, manure, and plant materials from garden operations, including grass cuttings, fallen leaves, and pruned branches.

“cause and effect ofWASTE POLLUTION” : 

“cause and effect ofWASTE POLLUTION” cause, or significantly contribute to an increase in mortality (death) or an increase in serious irreversible, or incapacitating reversible illness; or pose a substantial present or potential hazard to human health or the environment when improperly treated, stored, transported, or disposed of, or otherwise managed.

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