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.
For example, wave power, wind power, solar power or geothermal energy are renewable energy sources. ] and non-renewable [non-renewable: A resource that cannot be replaced when it is used up, such as oil, natural gas or coal. ] . It is a cheap and readily available source of energy. 2  If replaced, biomass can be a long-term, sustainable energy source. 3  When burned, it gives off atmospheric pollutants, including greenhouse gases.