For as long as humans have existed, they have been interested in one thing: energy. Energy and its use have been a big question mark for humans throughout history. Furthermore, every time man finds a source of energy he is never satisfied. The human race has always sought to find newer and more effective ways of energy to display its dominance. For hundreds of years, humans have fallen in love with fossil fuel energy. These various types of energy are very effective for any needs that humans might have. There are a couple of disadvantages that have been highlighted that have pushed us as a human race to look for new ways of energy. But these new energy sources can not only be new, they can not only be cheaper than fossil fuels, but they must also be more efficient and cleaner for the environment. This limits what could actually be the new and improved energy source the human race turns to because if it were easy to understand and use, then it would have already been made. Technological improvements, however, have paved the way for a new type of energy that is starting to take hold rapidly; this new energy is renewable energy. This type of energy will never run out and is better for the environment because it uses natural things and only gets energy from them. Solar, wind, and hydropower are three main types of renewable energy sources that have begun to lead the way in this movement of change, the only question is whether they are actually cheaper, more effective, and easier to use. The prime example of a renewable energy source is solar energy. This type of energy comes from the abundant energy of the sun. The way solar energy works is that it uses solar panels or solar cells to create and convert solar energy into mechanical energy, ...... half of paper ...... c Energy. " Energy Facts: Hydroelectric Power. Ohio State University, n.d. Web. November 30, 2013. Department of Energy and Climate Change. "Costs of Electricity Generation," October 2012. Web. December 1, 2013. "FAQ - Size." View. National Wind Watch, n.d. Web. Dec. 1, 2013. Union of Concerned Scientists. “Environmental Impacts of Wind Energy.” Union of Concerned Scientists. “How Solar Energy Works,” Dec. 16, 2009. Web. Nov. 30, 2013. U.S. Department of Energy. “Wind Program Benefits and Challenges.” Energy, Oct. 10, 2013. Web. Dec. 1, 2013. U.S. Environmental Protection Agency “Hydroelectricity.”".. 2013.