1. Major component of coal
2. Slow conversion of wood into coal
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wood is lakdi and cola is black
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- Major elements are elements that constitute more than 1 percent of the coal by weight: carbon, hydrogen, oxygen, nitrogen, and sulfur.
- Conversions of wood into coal is a slow process and may take thousands of years to take place. The slow conversion of wood into the coal under the influence of high temperature, high pressure and in the absence of air, is termed as carbonization. ... The process of slow conversion wood into coal is "carbonisation".
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