As the world population grows, more energy is needed to use in millions of peoples daily basis. Alternative non-polluting energy sources are said to be “the energy of the 21st century” as we are facing an environmental problem, global warming.
Every 15 minutes he earth receives enough energy from the Sun to power everything in our planet for a whole year! If we could use sunlight for all our energy needs, there would be no need to burn fossil fuels (coal, oil and gas) or to build nuclear power stations to produce electricity. But only a tiny fraction of the energy we use actually comes from the sun. One problem is its cost. Electricity made from sunlight is expensive, as the material the panels are made from is not cheap, but the cost is coming down as technology improves. Fossil fuels, which are contaminating are used so widely used because they give up the energy stored inside them very easily, by burning them. But people and society are increasingly concerned about pollution caused by burning fossil fuels and the waste that nuclear power produces as it is making of the world a worst place to live on and a clean alternative source of energy can help fight against a transcendental theme as global warming.
Science has always contributed in the development of as it has always made technological advances in he process of converting the suns energy into electricity. In fact, in 1954 however, that scientist in the United States produced electricity from the sun - to power satellites in space. They invented photoelectric (or photovoltaic) panels (or cells), which capture the sun's energy and turn it into electricity, which still today is the main way we can get power from the Sun. With the advances made by science as the years have passed solar technologies now range from traditional methods related to food, heat and light to large-scale electrical generation systems.
(really called "photovoltaic" or "photoelectric"...