Polluted Oceans and Seas
By____
Polluted Oceans and Seas
Are all the seas and oceans polluted?
• Some seas, like the Mediterranean Sea,
are more polluted than others because
they only have a very small outlet into
the ocean and the pollutants stay in the
water (basin).
• The oceans that are the main seaways
of oil tankers are sometimes very
polluted.
Polluted Oceans and Seas
• The seas near the north pole and the south
pole are less polluted because there are less
factories and oil tankers near them. The
melting icebergs also add a lot of water to
the multitude and the pollutant becomes less
harmful to the creatures and plants of the
sea.
Polluted Oceans and Seas
Seas all over the universe
Polluted Oceans and Seas
Why are the seas polluted?
• Here are some of the reasons:
Countries let sewage flow into rivers and seas
Factories pour chemical waste into them - emissions
Oil tankers spill a lot of the oil they carry, especially
if there are accidents.
Pesticides that are washed from the soil by rain and
floods flow into the seas.
People throw all sorts of garbage into the sea
(plastic bottles, bags, tyres, metal).
Polluted Oceans and Seas
Polluted Seas and Oceans
Polluted Oceans and Seas
What happens to the water?
• The water becomes dirty and polluted.
• It contains a lot of dangerous chemicals that
can cause cancer and other illnesses.
• It has a lot of dangerous germs that can
cause harm.
• In some places the water becomes oily and
inflammable.
Polluted Oceans and Seas
Chemical waste is discharged into a river
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Who suffers when the seas are polluted?
• People suffer because many beaches are
polluted and they cannot use them.
• People suffer because they get sick.
• There is less and less food that lives/grows
in the sea like: fish, seafood, seaweed.
Polluted Oceans and Seas
Polluted Oceans and Seas
• Creatures that live in the sea suffer/die
because of the chemicals that harm them
and also because a lot of their food (the
food chain) is being destroyed by pollutants.
• Many plants and corals are destroyed by the
chemicals.
• Many sea birds and other animals die or get
covered in oil when a tanker causes a
spillage of oil into the sea.
Polluted Oceans and Seas
A dead sea lion
The food-chain in
the sea
Polluted Oceans and Seas
What can be done to clean the seas?
• Fines should be put on countries and factories that
pollute the seas.
• There should be less tankers plying the seas and
more pipe lines built to carry oil from one country
to another.
• Counties should be encouraged to use more solar
energy
• Farmers must use less pesticides. They should be
encouraged to use organic agriculture.
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•People must help clean the beaches and the seas.
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Internet sites
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www.ourplanet.com/imgversn/ 103/08_small.htm
www.redtide.whoi.edu/.../ASP/ CAsealions7-13-00.html
members.cox.net/theplasters/ iceland_photos.htm
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www.cise.ufl.edu/depot/ doc/xfig/Examples/
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www.ukrivers.net/ pollution.html
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www.georgiastrait.org/CleanBoating/ guidep6.htm
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www.mos.org/oceans/ life/webs.html
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www.kidport.com/RefLib/Science/ FoodChain/FoodChain.htm
www.idw.org/_derived/ danger.htm_txt_Sweep_Sea.gif
: www.suttonpark.ie/missionpossible/ mp/research/water2.html
• www.howproductsimpact.net/emissions/ emissionshomepage.htm
Polluted Oceans and Seas