Welcome to Spotlight.
I'm Robin Basselin.
And I'm Ryan Geertsma.
Spotlight uses a special English method of broadcasting.
It is easier for people to understand, no matter where in the world they live.
There is a building project in the Amazon rainforest in Brazil.
Construction workers make wide roads through the trees.
They drive big trucks to the Xingu River.
There they empty their loads of rock and sand.
The construction site is noisy and busy.
Suddenly, six small simple boats arrive on the river.
Men jump out of the boats.
The men have black and red paint on their faces and bodies.
They carry long, sharp spears.
But the men with the painted faces do not hurt anyone.
They ask for the keys for the trucks and machines.
The workers are afraid.
Many of them run away.
The construction work stops.
The painted men live in the area around the Xingu River.
They came to peacefully protest the building project.
A power company is building a very large dam on the river.
The Belomonte Dam.
This dam will make electricity.
But it will also affect the local people.
Dam projects have caused protests like this in many places in the world.
Today's Spotlight is on dams and how they affect people and the environment.
A dam is a barrier across a river, like a huge wall.
This barrier is usually made of hard, grey concrete.
It controls the flow of the water.
On one side of the dam, the water collects in a calm lake.
On the other side, water pours quickly through the structure.
Some dams look like a very heavy waterfall.
This water does more than create an amazing sight.
It moves quickly and turns a turbine.
This machine creates electricity.
About 20% of the world's electricity comes from dams.
And this electricity is renewable.
Water does not get used up.
It can flow through the dam over and over again.
And this does not usually create waste or pollution.
This is the main reason that people build dams.
But there are many other good and bad effects of dam projects.
The lake part of a dam is a good place to store water.
It can also help to control flooding.
People can control how quickly the water flows through the dam.
So if there is too much rain, they can release more water.
When there is not enough rain, people can stop the water from flowing.
Then the lake can be used for irrigation.
Farmers and other people who need water can pump it from the lake.
In some places, these lakes are also places for recreation.
People can do water sports or use the area for fishing.
But a dam can also cause many problems.
Building a dam changes the land and environment over a large area.
When people build a dam, they flood a large area of land.
This creates the lake.
But there are plants and animals that live on this land.
So the animals must leave the area.
Trees and plants die under the water.
Sometimes there are trees or animals that only live in that area.
If they die, then there will be no more of them left in the world.
The fish in the Xingu River in Brazil are an example of this.
The Belo Monte Dam project is changing the river.
Many of the local fish populations are decreasing.
This is a problem for the people who live in the area.
The fish are their main food.
It is also a problem for the fish themselves.
One kind of fish living in the Xingu River is the zebra pleco.
These are small black and white fish.
They are found only in the Xingu River.
The dam project is moving the river.
It is possible that none of the zebra pleco fish will survive.
Dams affect more than just the wildlife in an area.
They affect people too.
If the Belo Monte Dam is built, more than 24,000 people will have to leave their homes.
The area will be flooded.
Many of these people are native people.
They have lived around the Xingu River for generations.
They depend on the river and rainforest to survive.
Many of these native people do not want to move.
Ilio Alaves de Silva is a fisherman in the area.
He told Al Jazeera News, Belo Monte is breaking up our community and kicking us out of here forcefully.
We have no choice.
For me, the saddest part of this story is that everything I have helped create here I am now watching being destroyed.
The company building the Belo Monte Dam promised they would help the local tribes.
Governments and companies sometimes try to work with the communities who live near a dam project.
They ask to build a dam in the community.
And in return, they may offer to help the people who live there.
But the help does not always come.
The tribes near the Belomonte Dam say that the power company is not helping them.
Bebtuk is one of the tribal leaders.
He explained to Al Jazeera why he and his tribe are protesting the work of the dam.
We would not be here today if the company and the government would have done what they promised to us.
In my community, nothing has been done.
There is no quality health post.
There is no school.
They have not built a road for us.
My road is the river, and that is going to be dried up."
No one knows what will happen to the people in the Belo Monte Dam area.
There are many protests in this area.
And the dam will destroy a large part of the Amazon rainforest.
Sadly, this situation is common in many dam building projects.
Some dams do get good results in providing electricity.
But they have a big effect on the people and environment.
Is there a dam near where you live?
Has it had any effect on the people who live near it?
How has it affected the plants and animals around the dam?
Tell us about it.
Leave your comments on our website.
Or you can email us at radio at radioenglish dot net.
You can also find us on Facebook.
Just search for Spotlight Radio.
The writer and producer of this program was Rena Dam.
The voices you heard were from the United States.
All quotes were adapted for this program and voiced by Spotlight.
You can listen to this program again, and read it, on the internet at www.radioenglish.net.
This program is called, The Good and Bad of Building Dams.
We hope you can join us again for the next Spotlight program.
Goodbye.
