All energy sources are either renewable or nonrenewable.
In the last several years, however, these renewable energy sources have seen technological advances that are making them more efficient and more cost-effective. Along with these improvements is a growing public concern and desire for a cleaner and healthier environment. As nonrenewable resources dwindle and environmental safeguards grow, it is apparent that renewable energies are a viable answer for society's future needs. Solar Energy Solar Energy is the most abundant form of energy. The sun's energy can be converted to other forms of energy such as heat and electricity for use by consumers, but certain major problems must be dealt with before solar energy can be used extensively.