Rachel's+essay


 * Solar Energy** is a renewable energy, which means it is better for the environment than other types of energy. Aside from solar energy, hydropower, wind, biofuels, and nuclear energy are the other renewable energies. Solar energy harnesses the sun’s energy using photovoltaic cells and converts it into energy.

**Wind energy** is another renewable energy. During a huge storm the wind turbines, however, could get damaged or even be completely destroyed. “The blades of wind turbines can hit birds who attempt to fly between them, especially if the turbines are placed in migratory flight patterns.” Wind does not always have a constant speed. Therefore, wind power would not always be constant. Wind turbines are extremely loud. The noise of one turbine can be about the “same level of noise as a car traveling 60mph on the highway."
 * Hydroelectric** is energy that is produced basically from moving water. This type of energy can be especially harmful for fish. The fish can easily get injured with different structures and mechanisms inside the dam and squeezing through narrow gaps between fixed and moving parts.” The dams are not capable of producing energy if there is no water available during a drought. Hydropower impacts the quality of the water as well as the water flow. “Hydropower plants can cause low dissolved oxygen levels in the water” which can be harmful to the nature around it. Another disadvantage is that dams can cause major flooding of an area.

"Biofuels: Pros and cons | BiofuelsWatch.com." //Biofuels, bioenergy | BiofuelsWatch.com//. Web. 11 Dec. 2009. <[]>. "HowStuffWorks "Biodiesel Cons"" //Howstuffworks "Auto"// Web. 11 Dec. 2009. <[]>. "Pros and cons of nuclear power | Time for change." //Time for change | For whom enough is too little - nothing is ever enough//. Web. 11 Dec. 2009. <[]>. “Pros and cons of Wind Power." //Wind Power from Wind Turbines//. Web. 11 Dec. 2009. <[]>. "Think Green Resources - Hydropower Pro's and Con's." //Think Green Resources - Renewable Energy//. Web. 11 Dec. 2009. <[]>. "Wind Energy Pros and Cons." //Buzzle Web Portal: Intelligent Life on the Web//. Web. 10 Dec. 2009. <[]>.
 * Biofuels** are fuels made of renewable biological resources that is made to replace oil products like petrol and diesel. “The environmentalists say that if the use of biofuels is promoted, than more and more land will be used to produce crops to make biofuels,” this will cause animals and plants to loose their natural habitat. Although biofuels do not emit carbon dioxide, “A new research has revealed that the burning of materials to produce biofuels emits enough nitrous oxide” which just like carbon dioxide can cause the greenhouse effect. Many cars being used today would not be able to support biofuels. They can break down rubber and “can cause the fuel filter to become jammed with the newly freed deposits.”
 * Nuclear Power** emits low amounts of carbon dioxide and also generates a “high amount of electrical energy in one single plant.” However, nuclear energy is not especially safe, the waste from it needs to be “carefully looked after for several thousand years.” Nuclear power plants produce a radioactive waste, which can be used to make nuclear weapons. Nuclear energy’s energy source comes from Uranium, which is not quite abundant; and depending on the demand for it, it may not last for the next 50 years.
 * Bibliography**