1. Wind Energy

2. Summary:
Energy is taken from wind using wind turbines to make electricity. the wind is mechanical power then made in to electricity. The medicine you use to turn wind into electricity is called a wind turbine.
Wind Turbines:
Wind turns two or three propeller-like blades around a rotor. the rotor is connected to the main shaft,which spins a generator to create electricity.

3. Background
the oldest use of wind energy was transportation using sails. The first windmill that was made in glasgow, scotland july 1887 by Prof James Blyth. In the 11th century people used windmills for farming in the middle east. In 1940 the largest wind turbine began operating and feed electric power to the local utility network for several months during world war two.

4. First windmill

5. Pros Cons Potential of wind energy is enormous
prices have dropped and are still dropping.
wind is free
renewable resource
reduces our dependence on fossil fuels from foreign countries
wind turbines can be a threat to wildlife
create a lot of noise
wind doesn't blow constantly
needs a lot of open land

6. used where?
In history they used wind energy to pump water from wells to watering troughs. In modern time you can use the energy to power homes.

7. Viable?
It's viable because there is no shortage on wind and it is renewable. The price is going down so more people can afford it and it can power everything you have in your home.

8. My Opinion
I believe that wind energy is good because over time it will save you money and me personally i hate polluant so anything that can reduce the amount of pollution is good with me.

9. The Outcome
Wind energy all started with a single windmill being created in scotland and has now progressed to the point when in 2012 there was 225,000 wind turbines operating in the world in about 80 different countries.

11. Hydroelectricity
By Janet Turner

12. What is it?
Hydroelectricity is from electricity generated by hydropower which is the production of electrical power through the use of the gravitational force of falling or flowing water.

14. History
The Greeks used water wheels for grinding wheat into flour more than 2,000 years ago.The evolution of the modern hydropower turbine began in the mid-1700s by a French hydraulic and military engineer, Bernard Forest de Bélidor. Today 6-8% of are electricity is hydropower.

15. Pros Cons - it's very expensive
- if there is a drought you will have no power
-building large hydroelectric power plants can lead to major environmental damage
- its a renewable resource
-it's very reliable
-it does not pollute the earth
- This power is safer then others

16. Used In/ For
In history the Greek used water wheels for grinding wheat into flour. 70% of electricity made in Washington state is produced by hydroelectric places. Hydropower can power your home but not if you live in a very dry place.

17. Viable?
As long as it keeps raining, and as long as gravity keeps pulling water downhill, hydropower will be a viable way to generate electricity.

18. My Opinion
I think that hydroelectricity is good but not one of the best because if you live in a dry place you can't use it and if you have a draught you will not get power.

19. The outcome and the future
Hydroelectricity started with the Greeks using it to make flour and now it can powering are homes. And now New hydroelectric facilities began running in both 2008 and 2009, showing that if the current environmental concerns can be quickly helped,hydroelectric power will have a very bright future.