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Chapter 1 Introduction 1.1 The origin of Coal Coal is a non-renewable energy source formed by dead plants that have been compressed and heated. It all starts with the plants that lived 300 million years ago. The plants that died in swamps were covered in layers of water and dirt, compressing and heating the plants. Through this process the energy is trapped and forms coal. Since coal is combustible, we then can burn the coal to get the trapped energy. 1.1.1 Background The most favorable period for the formation of coal was 360-290 million years ago, during the carboniferous period (which means “coal-bearing”). However, lesser amounts continued to form in some parts of the earth during all subsequent periods, in particular the Permian period (290-250 million years ago), and throughout the Mesozoic era, 250-65 million years ago. The accumulating plant matter buried during the Tertiary period, i.e. less than 65 million years ago, is generally less developed-it often comes in the form
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