The document discusses hydroelectric energy and Kelsey Walker's visions for its future use. It defines hydroelectric energy as using flowing water to create electricity, typically through dams. It notes hydroelectricity's advantages as a renewable and inexpensive source but also its disadvantages, such as disrupting river ecosystems. Kelsey envisions hydroelectric becoming the primary US energy source due to its renewability and existing infrastructure but decreasing globally as demand has recently dropped in places like Europe and China.

1. By: Kelsey Walker

2. Table of Contents
1. What is Hydroelectric energy?
2. Advantages
3. Disadvantages
4. My Vision of the future in the US
5. My vision of the future around the
world
6. Pictures
7. Video

3. What is Hydroelectric energy?
Hydroelectric energy is the use of flowing water
to create electricity.
The most common type of hydroelectric plant
uses a dam on a river to store water in a reservoir.

4. Advantages
Controls flooding & provides recreational activities .
Simple design makes for inexpensive repairs and
maintenance costs.
Renewable energy source, because the water is not
destroyed by passing through the dam.
If needed, dams can be shut down instantly, where thermal
plants take hours, and nuclear plants can take days!
Very few breakdowns.

5. Disadvantages
Disrupts natural seasonal changes in the river, and
ecosystems can be destroyed.
Ends flooding that help to clean out the silt in rivers,
causing them to clog .
Studies show that the plant decay caused downstream
of major dams produces as many greenhouse gasses as
more conventional methods of producing electricity.
Dams are expensive to build, and due to drought may
become useless, or produce much less power than
originally planned.
Dams can break in a massive flash flood.

6. My Vision of the future in the US
I believe that Hydroelectric Energy
will become the main source of energy .
1) It’s renewable
2) Inexpensive
3) 2,000 hydroelectric power plants

7. My vision of the future around the world
Hydroelectric energy use will
decrease greatly around the
world.
In 2008 the demand for
hydroelectric power dropped
for the fist time in 30 years.
In 2009 it continued drop in
Europe ,China, etc.

8. Pictures