Water Pollution Environment Presenter: Hye-young Yoon Instructor: Lyra Riabov ESL Level 5

Outline Usefulness of water Today’s water pollution Causes of water pollution Solutions for keeping our water clean References

do you want to go swimming Water The most important resource. People can survive without food for several weeks, but without water we would die in less than one week. During summer time, do you want to go swimming or go to beach?

What on Earth do you Know about Water? Cover 80% of Earth’s surface. Only 1% of this water is fresh we can use. 97% - Saltwater 2% - Frozen in glaciers Use 168 gallons of water a day. Move in a never-ending cycle Water you drink = Water a dinosaur had drunken Be limited and threatened by pollution. 80 percent of Earth’s surface is covered with water. Only one percent of this water is fresh we can use. 97 percent is saltwater Two percent is water frozen in glaciers Water moves in a never-ending cycle; nature recycle it over and over again. Therefore, water you drink now = water a dinosaur have drunken You use an average of 168 gallons of water a day Earth’s fresh water supply is limited and threatened by pollution

Dying Ocean because of Dumping and Floating waste Today’s Dying Water Dying Duck by Oil Spill Child and Dying Fish Dying Ocean because of Dumping and Floating waste

For Water What are causes of water pollution? Make a choice, where do you want to live? Unfortunately, today’s water looks more like in the right picture. Also, water condition is becoming even worse than ever. What are causes of water pollution? What do we have to do for saving our water?

What are the Causes? Toxic Matter Agricultural Chemicals Oil Spill Other factors Sediment, Acids, Pathogens, Organic Matter, etc.

Toxic Matter Minamata Disease A great of poisonous compounds get into water. Minamata Disease In the 1950s, industries around Minamata Bay in Japan discharged so much mercury into the bay that people were poisoned by mercury that had found its way into the local seafood. 

Agricultural Chemicals Be applied to fields to stimulate the growth of plants. Enter streams and lakes. Be occurred seriously damage at a lake or stream. Lead to a drop in the population of fish.

Oil Spill When oil is spilt at sea, a number of weathering processes produce changes in the physical and chemical properties of the oil's behavior at sea.

Recently, the oil tanker SS Minnow attempted to dock in Gilligan's Bay Recently, the oil tanker SS Minnow attempted to  dock  in Gilligan's Bay. The ship  accidentally  ran  aground and is leaking oil!! However, not all marine oil pollution is sourced from oil spills. Of that amount around 45 per cent came from shipping and within that category, 12.5 per cent was attributable to tanker accidents

What are Solutions? Prevention Clean-up Conservation by yourself How can we solve the problem?

Prevention Appropriate legislation Don’t released previously Pollution prevention is an aim of lawmaking. As simple as regulations about dumping used motor oil onto the ground or into sewage system As complex as the regulations controlling the effluent from industries or municipal sewage treatment facilities Don’t released previously Toxic or disease-causing materials So harmful that natural systems can’t handle

Clean-up Physical treatment Filtration. By this time the liquid should be almost clear and have very few particles in it. Chemical treatment After filtration, the water requires addition chemicals. Biological treatment Using bacterial is critical for the purification of water. Three types of waste water treatment:

12 THINGS YOU CAN DO TO SAVE WATER Check toilets, pipes, and faucets for leaks. Don't use the toilet as a trash can. Put a plastic bottle in the toilet tank so that your toilet uses less water. Take shorter showers. Help a grown-up install water-saving showerheads in your home. Take baths instead of showers. Turn off the water while brushing your teeth. Use automatic dishwashers only when you have a full load. Use the washing machine only when you have a full load. Turn off the water while cleaning vegetables. Keep drinking water in the refrigerator. If washing dishes by hand, don't leave the water running.

Conclusion

References http://cse.cosm.sc.edu/env_sci/Impacts/Pollution/Water/Intro.htm http://www.epa.gov/gmpo/edresources/water_5.html http://www.soton.ac.uk/~engenvir/environment/water/water.html http://images.google.com/images?q=water+pollution&svnum=10&hl=en&lr=&ie=UTF-8&oe=UTF-8&start=60&sa=N http://www.ukrivers.net/pollution.html http://www.units.muohio.edu/dragonfly/water/downtubesmap.shtml http://www.sintef.no/units/chem/environment/lab/Oil-spill.htm http://kr.imagesearch.yahoo.com/search/detail?p=imgid%3A275448&q=%bc%f6%c1%fa+%bf%c0%bf%b0&&num=10 If you want to get information more than my presentation, go these sites!!