Today, the major problem facing solar energy - especially for the production of electricity - is its cost, which is still high when compared not only to fossil fuels but also to renewables such as wind or hydropower. Despite the free and inexhaustible solar power source, the up-front cost for the equipment to collect and store solar energy is high. Likewise, due to the diffuse nature of sunshine, the collecting area necessary to produce large amounts of solar energy is by necessity large. The absence of sunlight during night-time and reduced insolation in cloudy conditions also necessitates back-up generators or expensive and limited-energy storage batteries. With continued research and technological improvements however, solar energy will in the long run certainly become an important part of our energy-mix.
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Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.