World Oceans Day was originally proposed in 1992 at the Earth Summit in Rio de Janeiro to raise awareness of the impact of human actions on the oceans and mobilize efforts for sustainable ocean management. It is celebrated annually on June 8th to educate the public on the vital role oceans play and encourage environmentally friendly behavior. The document then provides background on the size and characteristics of the five major oceans - Pacific, Atlantic, Arctic, Indian, and Southern - and discusses causes and effects of ocean pollution like dumping of sewage, land runoff, and eutrophication which harm marine life and contaminate seafood consumed by humans. Some ways individuals can help reduce pollution include using fewer plastics, opting for reusable products,

1. PRESENTED BY
RANJANA .V
GRADE 11

3. Facts about ocean
1. The ocean is home to
nearly 95 percent of all life.
2. Coral produces its own
sunscreen.
3. There's enough gold in the
ocean for us each to have 9
pounds of it!
4. There's an ice sheet larger
than the continental United
States.
5. Sharks have their own
underwater "café."

4. why ocean day celebrated ?
The concept was originally proposed in 1992 by Canada's
International Centre for Ocean Development (ICOD) and
the Ocean Institute of Canada (OIC) at the Earth Summit –
UN Conference on Environment and Development
(UNCED) in Rio de Janeiro, Brazil.
The purpose of the Day is to inform the public of the
impact of human actions on the ocean, develop a
worldwide movement of citizens for the ocean, and
mobilize and unite the world's population on a project for
the sustainable management of the world's oceans.
World Oceans Day is held every year on 8th June to raise
awareness of the vital importance of our oceans and the
role they play in sustaining a healthy planet.

5. Why is the ocean blue?
The ocean acts like a sunlight filter.
The ocean is blue because water absorbs
colors in the red part of the light
spectrum. Like a filter, this leaves behind
colors in the blue part of the light
spectrum for us to see.
The ocean may also take on green, red, or
other hues as light bounces off of floating
sediments and particles in the water.
Most of the ocean, however, is completely
dark. Hardly any light penetrates deeper
than 3,280 feet. deeper than 656 feet,
and no light penetrates

6. Top 5 largest ocean in world
1. PACIFIC OCEAN
2. ALTANTIC OCEAN
3. ARTIC OCEAN
4. INDIAN OCEAN
5. SOUTHERN OCEAN

7. Pacific ocean atlantic ocean
The Pacific Ocean is the largest ocean covering
more than 30% of the Earth. This is close to
half of the water on Earth.
It touches the west coast border of the
Americas along with east Asia and Australia.
The equator divides the Pacific Ocean into two
separate parts – the North Pacific Ocean and
South Pacific Ocean.
The Atlantic Ocean is situated between
the Americas and European/African
continents. The Atlantic Ocean is the
second-largest and saltiest ocean in the
world.
It resembles an S-shape between the
Americas, Europe, and Africa. “Atlantic”
originated from the Greek god “Atlas”
who carried the sky for eternity.

8. Arctic ocean indian ocean
• The Indian Ocean is the third largest ocean
surrounding a densely populated region. It
contains an additional 20% of the water on
Earth’s surface.
• It borders India in the North, East Africa,
Australia, and the Southern Ocean. Because
of the higher water temperature, it has
limited marine life.
• The Arctic Ocean is the world’s smallest and
shallowest ocean of all 5 oceans. Further to
this, it is the coldest and least salty ocean.
• In size, the Arctic Ocean is about the size of
Russia. Because it’s located at the North
Pole, the Arctic Ocean has polar ice. But
over the years, glaciers have melted
threatening sea levels to rise.

9. Ocean pollution
More than 70% of the Earth is covered with
bodies of water. Lakes, rivers, seas, and
oceans play a vital role in our day-to-day
life and form an indispensable part of our
existence: food, transport, hydration, and
temperature regulation are just some of
the things they give us. So when these
water sources are polluted, we humans
feel the effects.
Ocean pollution refers to the introduction
of toxic materials and other harmful
pollutants such as agriculture and
industrial waste, chemicals, oil spills, and
plastic litter into the ocean's waters. The
ocean provides humans with several
resources and economic benefits, yet it is
treated as a worldwide trash basin.

10. The Causes Ocean
Pollution
There are several causes of ocean pollution. Some
of the main causes are listed below.
Dumping Of Sewage
The dumping of sewage in the ocean is often
regarded as the cheapest and easiest method of
sewage disposal.
Land Runoff
Referred to as non-point pollution, runoff is caused
when the soil is infiltrated with water to its
maximum extent and the excess water then flows
from the land into the ocean via the drainage
systems like rivers and streams
Eutrophication
Researchers have noted that the increased
concentration of harmful chemicals in the ocean
leads to Eutrophication

11. Effects Of Ocean
Pollution
Ocean pollution has resulted in serious
adverse effects on marine life as well
as multiple negative impacts on the
environment and human health. The
harmful toxins and industrial chemicals
that enter the oceans get
accumulated in the fatty tissues of
aquatic fauna and lead to severe
damage to their reproductive
systems.
The sea birds that depend on the
marine fishes for their food are also
subsequently affected. When humans
consume fish as seafood, they are also
getting contaminated by these
harmful chemicals.

12. How can you help our ocean?
1.Use fewer plastics. Plastic pollution makes up a significant
portion of the ocean’s debris because many ocean plastics
can take thousands of years to break down properly
2. Opt for multi-use products. Single-use plastics or paper
goods like utensils, straws, paper towels, and plastic bottles
are major contributors to ocean pollution.
3. Avoid chemical fertilizers. The chemical fertilizer that
you use on your lawn or in your garden can eventually make
its way to the ocean through rivers, rainwater, and other
waterways—even if you live far from the coast.
4. Recycle. Recycling is a process that converts used
materials into new ones, keeping waste out of trash cans,
gutters, and landfills, where they could be taken by wind or
water to the ocean.

13. THANK YOU
PRESENTED BY :
RANJANA .V
GRADE 11
RATHINAM INTERNATIONAL PUBLIC
SCHOOL