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The Problem Today, most of the electricity used in buildings comes from power plants. When these power plants create electricity, they are burning fossil fuels in the process. These burned fossil fuels then release carbon dioxide into the atmosphere as air pollution. The problem humans are faced with is how to reduce these carbon dioxide emissions, but at the same time, maintain or increase electricity production.

The Solution The solution to this problem is finding a cheap and nonpolluting source for energy. Photovoltaic fits both of those categories, it is a low cost to make and has absolutely zero pollution. It also gets its power from the sun so it is a renewable resource, meaning its supply can renew faster than we can use it. Another pro to using solar cells is that they have no moving parts which means low maintenance and high reliability. Although it is not as powerful as we would hope, more efficient models of photovoltaic cells are out and scientists are still trying to make it more efficient. Even if it is not as powerful as we would hope yet, it still provides electricity to the everyday household.

Evidence Right now, 98% of the US's eclectricity comes from nonrenewable sources. 70% of this is from fossil fuels. As we know, fossil fuels release CO2 into the atmosphere and harms it. By cutting down the amount of fossil fuels we burn to get electricity, we will be cutting down the amount of CO2 we put in the atmosphere. This will not stop gloabal warming, but it will slow it down.

Bibliography Arms, Karen. //Environmental Science.// Georgia: Holt, Rinehart and Winston, 2008

Kobasa, Paul." Living Green: Green Buildings.//" World Book Encyclopedia.// 2009

Bryan, Harvey. "Solar energy." //World Book Student.// World Book, 2009. Web. 2 Dec. 2009. 