write some questions to know about coal
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what is coal?
how it is formed?
why it is called black gold?
how it is formed?
why it is called black gold?
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what is coal ?
where is coal found??
how is coal formed ??
can coal be used directly ??
what are the uses of coal??
why is coal important for us ??
plzzzzz like it
where is coal found??
how is coal formed ??
can coal be used directly ??
what are the uses of coal??
why is coal important for us ??
plzzzzz like it
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