Which of the following is not a commercial source of energy?

1.	Which of the following is not a commercial source of energy?
Answer» <html><body><p> Firewood</p><br/><br/><p>Firewood is not a <a href="https://interviewquestions.tuteehub.com/tag/commercial-923169" style="font-weight:bold;" target="_blank" title="Click to know more about COMMERCIAL">COMMERCIAL</a> <a href="https://interviewquestions.tuteehub.com/tag/source-1219297" style="font-weight:bold;" target="_blank" title="Click to know more about SOURCE">SOURCE</a> of <a href="https://interviewquestions.tuteehub.com/tag/energy-15288" style="font-weight:bold;" target="_blank" title="Click to know more about ENERGY">ENERGY</a>.</p></body></html>

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