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 Energy in Iceland. Iceland is the only country in the world which obtains 100% of its electricity and heat from renewable sources. 87% of its electricity comes from hydro-power, and the remaining 13% from geothermalpower. Oil-powered fossil fuel power stations are only used as backups to the renewable sources.