Energy Resources: Coal Reserves

Coal Coal is a nonrenewable energy source that takes millions of years to form, and it contains the energy stored by plants that lived hundreds of millions of years ago in swampy forests. Coal contains carbon, volatile matter, moisture, ash, and sometimes sulphur and...

 Mica, Limestone

Mica Mica is a naturally occurring non-metallic mineral based on a collection of silicates. It occurs in the veins of metamorphic rocks and is also found in igneous and occasionally sedimentary rocks. Mica is chemically inert, stable, and does not absorb water. It is...
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