water pollution

GUIDING TEACHER:NICOLETA CRISTEAN

SCHOOL NO.19SCHOOL NO.192010

SUPPORTERS: Fironda Simona

Bochie DianaNesiu RazvanPopa Cristian

Petcu Alex

• What causes Water What causes Water PollutionPollution

•Examples of Examples of Water PollutionWater Pollution

•Ways to prevent Ways to prevent Water PollutionWater Pollution

WHERE DOES SOME OF WHERE DOES SOME OF THE PLASTIC WE USE THE PLASTIC WE USE

GET?GET?

Circa 200 Circa 200 de specii diferite de de specii diferite de vieţuitoare subacvatice, incluzând vieţuitoare subacvatice, incluzând

balene, delfini, foci şi ţestoase mor din balene, delfini, foci şi ţestoase mor din cauza pungilor de plasticcauza pungilor de plastic

- - RaportRaport WWF 2005 WWF 2005

--

AdicăAdică, 22,176 , 22,176 pungi de plastic pungi de plastic în timpul unei vieţi mediiîn timpul unei vieţi medii

THE AGE OF PLASTICTHE AGE OF PLASTIC

• Did you know that Did you know that burning plasticburning plastic produces produces toxic ashtoxic ash??

• The only real hope, experts say, lies The only real hope, experts say, lies in shaking our dependence on plastic in shaking our dependence on plastic andand

drastically reducing the amount that drastically reducing the amount that we we

produce.produce.

THE KEY TO SOLVING THE KEY TO SOLVING THE PLASTIC WASTE THE PLASTIC WASTE

PROBLEMPROBLEM

●● MMight be the development of degradableight be the development of degradable plastics that, once thrown away, will plastics that, once thrown away, will disappear.disappear.●● Scientists try to modify the manufacturingScientists try to modify the manufacturingrecipe in order to get eitherrecipe in order to get eitherphotodegradablephotodegradable plastics ( that break apart in the plastics ( that break apart in the

presence of light ) or presence of light ) or biodegradablebiodegradable ones ( that incorporate naturalones ( that incorporate natural

polymers such as starch and cellulose which polymers such as starch and cellulose which dump - resistant bacteria can digest )dump - resistant bacteria can digest )

THE PLASTIC WILL GET THE PLASTIC WILL GET INTO INTO

BODIES OF WATERBODIES OF WATER

Organic water pollutantsOrganic water pollutants• Detergents Detergents

• Food processingFood processing

• Insecticides and herbicidesInsecticides and herbicides

• PetroleumPetroleum

• EtcEtc..

Inorganic water pollutants

• AcidityAcidity

• AmmoniaAmmonia

• Chemical wasteChemical waste

• FertilizersFertilizers

• Heavy metals from motor vehiclesHeavy metals from motor vehicles

• Etc.Etc.

Water pollution

Reduces the amount of pure water available for such

necessities as drinking and cleaning and for such activities

as swimming and fishing

• That affect water come mainly from: - industries - sewerage systems - farms• Most of the pollutants that people put into water

come from: - treated and untreated sewage - agricultural drainage - industrial wastes• The pollutants reduce valuable supplies of pure

water by upsetting the natural cycles that work to keep water clean

The The pollutantspollutants

INDUSTRIESINDUSTRIES

• Dump huge amounts of wastes into bodies of water each year.

• These wastes include - chemicals, - wastes from animal

and plant matter - hundreds of other substances. Some of the wastes may be hazardous

(harmful to human health).

Wastes from farms• include: - animal wastes - fertilizers - pesticides.

Sewerage systems

• carry wastes from - homes - offices - industries into water.

THERMAL POLLUTIONTHERMAL POLLUTION

•The addition of heated water to a body of water also upsets cycles.

•Heated water can kill animals and plants that are accustomed to living at lower temperatures.

• It also reduces the amount of oxygen that water can hold.

FUEL OILFUEL OIL

• Enters oceans mainly from oil tankers and offshore oil wells.

• Such spills ruin beaches and kill birds and marine life.

FIGTHING WATER FIGTHING WATER POLLUTIONPOLLUTION

• Some lakes and rivers may already be so badly polluted that they may not be able to regain their health even if all pollution is stopped.

• Waste products can be saved and used again.

• New technological developments can help prevent pollution from older ones.

• Restrictions can be placed on the use of materials that pollute.

•But in most areas, effective programs to prevent pollution

could greatly improve environmental conditions.

• Several different approaches can be used to control pollution.

• These approaches may result in less convenience and higher

costs, however.

• Don't keep the tap on when you brush your teeth!Don't keep the tap on when you brush your teeth!• DID YOU KNOW that leaving the water running DID YOU KNOW that leaving the water running

just 3 minutes can use up to 1 quart of drinking just 3 minutes can use up to 1 quart of drinking water? water?

• DID YOU KNOW that leaky or improperly turned DID YOU KNOW that leaky or improperly turned off taps can use up even more? off taps can use up even more?

• You can help just by checking to make sure the You can help just by checking to make sure the tap is completely turned off each time you use it!tap is completely turned off each time you use it!

SAVE THE SAVE THE EARTHEARTH