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.
This is a trend that has to be reversed if the world is to survive the degradation process that is going or happening at a much rapid pace. The main non-renewable energy sources are:-. 1. Coal : Coal is the most abundant form of fossil fuel available on earth. They were formed by the decay of old plants and animals several centuries ago. coal is mostly found below the earth and is major source of fuel for electricity generation as of today.