At present, pollution is a matter of grave concern; it is occurring due to the abundant burning of fossil fuels. Among the reasons for environmental pollution, one is the conventional method of power generation to produce electricity. If a portrait of the world's pollution is taken, the countries that use non-conventional power make many times less pollution than those with conventional power usage. As a result of massive pollution, climates all over the world have been changed, and people are facing lots of problems. To remedy this vital concern, the one and only way is to adopt the habit of utilizing renewable energy sources. Among all renewable energy sources, solar energy is the only major, environmentally independent source of energy that is sustainable and can produce a good amount of energy. The basic problem of solar cell is its high cost and poor efficiency. But new technology (nanotechnology) has been discovered that will reduce the cost of solar cell, with improved efficiency.
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