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.
Put another sweater on and check our top 10 most expensive, and cheapest, places for energy. Cheap energy locations. Venezuela: Petrolâs so cheap (7p a litre) it drives you Caracas. A city centre apartment sets you back Â£30,000. Canada: Electricity prices are a third of Britainâs.