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Презентация на тему Water pollution

"Man is a complex being; he makes the deserts bloom and lakes die." — Gil SternPesticides are carried in rainwater from farm fields, suburban lawns, or roadside embankments into creeks. Results:affect and damage the nervous system;
Water pollutionGreece, Spain and Germany have the cleanest coastal waters.Asian rivers are PCBs, Dioxins, and Other POPsPCBs polychlorinated biphenyl - ПХД полихлорированные дифенилы dioxins Control of water pollution In urban areas, domestic sewage is typically treated Industrial Wastewater TreatmentSome of these facilities remove the toxic components, and then Agricultural Wastewater TreatmentSediment (loose soil) washed off fields is the largest source Urban runoff (stormwater-ливневая вода) Effective control of urban runoff involves reducing flow Think about Water!!!Thank YOU =) turn off faucet while cleaning teeth
Слайды презентации

Слайд 2 "Man is a complex being; he makes the

deserts bloom and lakes die." — Gil Stern
Pesticides are carried

in rainwater from farm fields, suburban lawns, or roadside embankments into creeks.
Results:
affect and damage the nervous system;
cause liver damage;
damage DNA and cause a variety of cancers;
cause reproductive and endocrine damage;
cause other acutely toxic or chronic effects.



Слайд 3 "Society, my dear, is like salt water, good

to swim in but hard to swallow." — Arthur Stringer,

author, The Silver Poppy

Mercury comes through air pollution from industrial plants. In the water, the elemental mercury is converted to methylmercury by certain bacteria, after which it moves into food through a fish.
Young children and fetuses (плод) are most at risk because their systems are still developing.
Mercury causes neurological problems, including slower reflexes, learning deficits, delayed or incomplete mental development, autism, and brain damage.
Mercury for adults is also a problem, causing:
central nervous system effects like Parkinson's disease, multiple sclerosis, and Alzheimer's disease (разновидность пресенильного слабоумия);
heart disease;
death or irreversibly damaging areas of the brain.



Слайд 4 PCBs, Dioxins, and Other POPs
PCBs polychlorinated biphenyl -

PCBs, Dioxins, and Other POPsPCBs polychlorinated biphenyl - ПХД полихлорированные дифенилы

ПХД полихлорированные дифенилы
dioxins - poisonous chemical by-products of

the manufacture of certain herbicides and bactericides
POP - persistent organic pollutants tend to collect in the fatty issues of animals.

Слайд 5 Control of water pollution
In urban areas, domestic sewage

Control of water pollution In urban areas, domestic sewage is typically

is typically treated by centralized sewage treatment plants. Plants

are designed to control conventional pollutants(обычные загрязнит. в-ва) Well-designed systems can remove 90% or more of these pollutants.


Слайд 6 Industrial Wastewater Treatment
Some of these facilities remove the

Industrial Wastewater TreatmentSome of these facilities remove the toxic components, and

toxic components, and then send the partially-treated wastewater to

the municipal system.





Dissolved air flotation system for treating industrial wastewater.


Слайд 7 Agricultural Wastewater Treatment
Sediment (loose soil) washed off fields

Agricultural Wastewater TreatmentSediment (loose soil) washed off fields is the largest

is the largest source of agricultural pollution
Nutrients are

typically applied to farmland as commercial fertilizer, materials left after the crop has been harvested, water irrigation, wildlife



Слайд 8 Urban runoff (stormwater-ливневая вода)
Effective control of urban runoff

Urban runoff (stormwater-ливневая вода) Effective control of urban runoff involves reducing

involves reducing flow of stormwater, as well as reducing

pollutant discharges. Local governments use techniques (BMPs-best management practices) to reduce the effects of urban runoff : filters, clarifiers, biological reactors



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