Answers.comÂ® is making the world better one answer at a time. The element that makes the strongest material is carbon, and the material which is made is graphene. Thao Hg.
<br /><br /> Solar power is the cheapest renewable energy source for small-scale use, such as pocket calculators, LED lights, and remote (small) electrical appliances. Hydroelectric power is the cheapest renewable energy source for large-scale production. That is, it has the lowest cost to construct and maintain the generating facilities compared to the amount of energy produced.
Renewable. One of the foremost advantages of geothermal energy is that is it renewable and literally inexhaustible. Unlike conventional energy sources such as fossil fuels and nuclear, geothermal energy is a renewable energy resource like wind, solar, and wave energy. The heat from the earth is practically unlimited.