Environmental Health Unit: Water Pollution Lesson. Objectives : TSWBAT identify types, causes, dangers, preventing, and treating water pollution. TSWBAT create solutions and actions to reduce water pollution in our building and at home. . Water Pollution. - PowerPoint PPT Presentation
Environmental Health Unit: Water Pollution Lesson
Environmental Health Unit:Water Pollution LessonObjectives:TSWBAT identify types, causes, dangers, preventing, and treating water pollution.TSWBAT create solutions and actions to reduce water pollution in our building and at home.
Why is water important?
Water PollutionWater covers over 70% of the Earth's surface and is a very important resource for people and the environment. Water pollution affects drinking water, rivers, lakes and oceans all over the world. This consequently harms human health and the natural environment.
Types of PollutionCan come from a number of different sources:Single source = point-source pollution (oil spill)Many sources = nonpoint-source pollution (fertilizers, toxic chemicals, bacteria)Most affect the immediate area surrounding the source. May affect the environment hundreds of miles away from the source = transboundary pollution.
Sources of Water PollutionRunoff - when rainwater or melting snow flows across the ground and into the water supply (picks up pesticides, fertilizers, salts)Wastewater used water from homes, communities, farms, and businesses (can contain pollutants such as human wastes and pathogens)Sediment runoff can carry soil and other sediments into the water supplyOil spills from oil tankers and offshore drilling rigs can pollute the water
Great Garbage PatchWhat do you think???http://www.youtube.com/watch?v=FTurihxSTnI&feature=grec_index
Dangers of PollutionVirtually all types of water pollution are harmful to the health of humans and animals. Water pollution may not damage our health immediately but can be harmful after long term exposure.
How can you protect the environment? Practicing conservationRepair leaky faucetsDont leave water running unnecessarilyWait until you have a full load before doing laundry or running the dishwasherInstall low flow showerheads, toilets, and faucet aeratorsAvoid overwatering lawn and gardenReduce the use of household chemicalsKnow how to discard hazardous wastesReduce, Reuse, RecycleEat a bit less meat, especially beef. A typical hamburger can take 630 gallons to produce. "The Hidden Water We UseBuy less stuff. Everything takes water to make. So if we buy less, we shrink our water footprint.
Waste DisposalIf wastes are not properly contained or destroyed, they can pollute the land and water we rely on to liveMany types of waste are biodegradable (able to be broken down by microorganisms in the environment)
Solid waste trash or garbage - Landfills (specially engineered area where waste can be buried safely) - Incineration (burning wastes in specially designed incinerators)
Hazardous WastesWaste materials with properties that make them dangerous to human health or the environmentCorrosive, chemically unstable, highly flammable, or toxicMost must be treated to make them less harmful before being discardedIndustrial wastes solvents used for cleaning and degreasing, sludge and wastewaterHousehold wastes pesticides, paints, cleaning fluids, and batteriesRadioactive wastes sources such as nuclear power plants produce wastes that emit radiationMercury found in medical and dental wastes and in certain parts of carsPreventing PollutionConserve water Turn off the tap when running water is not necessary (helps prevent water shortages & reduces amount of water needing treatment)Use tap water rather than bottled water (The US goes through 50 billion water bottles a year)
Be careful about what you throw down your sink or toilet. Don't throw paints, oils or other forms of litter down the drain.
Use environmentally friendly household products: The production, use and disposal of environmentally unfriendly products create pollution, groundwater contamination and other threats to the ecosystem.
Preventing PollutionDont overuse pesticides and fertilizersThis will prevent runoffs of the material into nearby water sources. Plants in your garden: prevent fertilizer, pesticides & contaminated water from running off into nearby water sources. Don't throw litter into rivers, lakes or oceans. Help clean up any litter you see on beaches or in rivers and lakes. Make sure it is safe to collect the litter and put it in a nearby bin.
Preventing PollutionInstall low-flow showerheads and faucet aerators. Because youre saving hot water, youll also reduce your energy bill. If youre in the market for a toilet, buy a low-volume, ultra low-volume, or dual-flush model. Fix leaky faucets. All those wasted drops add upsometimes to 10-25 gallons a day. Run your dishwasher and washing machine only when full. When its time to replace them, buy a water- and energy-efficient model. Remember, saving water saves energy, and saving energy saves water.
Preventing PollutionEat a bit less meat, especially beef. A typical hamburger can take 630 gallons to produce. "The Hidden Water We UseBuy less stuff. Everything takes water to make. So if we buy less, we shrink our water footprint.Recycle plastics, glass, metals, and paper. Buy re-usable products rather than throw-aways, as it takes water to make most everything.Turn off the tap while brushing your teeth and washing the dishes. Shave a minute or two off your shower time. Millions of people doing even the little things makes a difference.Know the source of your drinking waterthe river, lake, or aquifer that supplies your home. Once you know it, youll care about it. You just wont want to waste water.