Did you know that there are Pink dolphins living in the fresh water?

It's surprising. Isn't it?

These beautiful Pink dolphins have lived in the Amazon river in South America for 30 million years.

They have many name such as, Boto dolphin, Amazon river dolphin, and because their skin color, Pink dolphin.

Sadly the Botos are great danger now.

They might die out before long.

It's because people have developed the Amazon rainforest without thought.

To meet people's need electric power, many new dams were built along amazon river.

Building dams kept the Botos away from many of fish that they eat.

Farming and logging are other big problems.

People have been burning a lot of trees to make room for crops or cutting them for wood.

Let's see how these human action cause problem for the Botos.

Some fish eat the fruits and seeds from rainforest trees into the Amazon River.

These fish in turn become food for the Botos.

Because the number of trees went down, the number of fruits and seeds too.

Then the number of fish went down, and so did the number of Botos.

The Botos, however, are not the only once hurt by human activities in the Amazon rainforest.

Some people living far away from the Amazon rainforest are danger too.

Tuvalu is the fourth smallest country in the world.

It is made up of low lying island in the South Pacific Ocean.

The island have beautiful white sand and coconut trees.

Over 11,000 Tuvaluans are live there, farming and fishing.

But can you believe that these island is sinking in to the ocean?

When did it begin to happen?

In the late 1980s, the scientists visiting Tuvalu said someday the island disappear from the map.

Over the next twenty years, Tuvaluan begin notice change on their home island.

High waves started getting higher and sea water began coming up onto the island.

As a result, the soil is becoming so salty that the farmers can't grow any crops.

Some island of Tuvalu are already under the sea.

You might now understand how Tuvalu is related to the Amazon rainforest.

First you have to know this: CO2 gas keeps teat in the atmosphere and as a result the earth gets hotter.

CO2 gas is made when we burn fuels such as oil or natural gas.

Trees in the Amazon rainforest take in the CO2 gas and release O2 gas in to the atmosphere.

In other world, the Amazon rainforest acts like the lungs of the earth.

Destroying the rainforest upsets the balance.

More CO2 is left in the atmosphere and less O2 is released.

This helps create the "green house effect" which causes global warming.

This causes weather to change and oceans to rise.

Because of this, Tuvalu is sinking in to the sea.

The Botos and the Tuvaluans are only the beginning.

At first, destroying the Amazon rainforest only hurt animals and plants living there, but now it is even hurting people living far away.

Soon, we might not be able to see the pretty pink dolphine or visit the beautiful Tuvalu islands any more.

As you can see, our aciton always boomerang on us. Maybe next time, it will be our turn.

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외워야댐

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