Answer:
Limited.
Step-by-step explanation:
Coal comes from plants the died 100-400 million years ago and takes million years to form. Therefore, Coal is limited.
Limited
Once it is used once, it is not reusable. Also, there's a possibility to use ALL the coal there is. That's why it's an unrenewable source, unlike the sun, wind, or water that never ends. Those are renewable
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