Abstract
The major challenge that our planet is facing today is the anthropogenic driven climate changes and its link to our global society’s present and future energy needs. Renewable energy sources are now widely regarded as an important energy source. This technology contributes to the reduction of environmental impact, improved energy security and creating new energy industries. Traditional Fossil fuels such as oil, natural gas, coals are in great demand and are highly effective but at the same time they are damaging human health and environment. In terms of environment the traditional fossil fuels are facing a lot of pressure. The most serious challenge would perhaps be confronting the use of coal and natural gas while keeping in mind the greenhouse gas reduction target. It is now clear that in order to keep the levels of CO2 below 550 ppm, it cannot be achieved fundamentally on oil or coal based global economy. Renewable energies can provide sustainable energy services, based on the use of routinely available, indigenous resources. A transition to renewable-based energy systems is looking increasingly likely as their costs decline while the price of oil and gas continue to fluctuate. Renewable Energies are considered as a clean source of energy and optimal use of these resources minimizes environmental impacts, produces minimum secondary waste and is sustained based on current and future economic and social needs. Sun is a major source of all energies. The primary forms of Sun’s energy are heat and light. Sun energy is transformed and absorbed in different way these transformations result in renewable energies like biomass and wind energy. Renewable energy technologies provide an excellent opportunity for mitigation of greenhouse gas emission and reducing global warming through substituting conventional energy sources. Solar energy is the most abundant renewable energy source available and in most regions its availability is far in excess when compared to the current primary energy supply. Therefore solar energy acts as a key tool to reduce carbon emissions and providing a clean environment. The transition from a carbon–based energy system to renewable solar energy system involves some technological, scientific and socioeconomic barriers to the implementation of solar energy as a clean technology for the future. . This research serves a review on “Renewable Energy Sources” mainly focused on Solar Energy. It summarizes how the resources are used in energy production in terms of resource potential, existing capacity. It discusses the historical trends and future growth prospects of solar energy in terms of what has been done till now in that field of development and what is the research which is going on for the future. The project also provides comments on the importance, benefits, and the key scientific and technical challenges of Solar Energy Technology as well as the detailed description on the different technologies that are being used worldwide and a review on the future prospects of solar energy supply under various scenarios by 2020, 2030 and 2050. The key concepts to this review are to develop a solid understanding of the multi facet technological, geopolitical, sociological, and the economic impacts of energy use and to provide insights into the solar energy development and usage