Explanation:

About Coal bed methane (CBM)

• It is an important unconventional gas occurring naturally in coal beds, is increasingly being used for industrial and utility purposes.
• It is a form of natural gas which can be recovered from coal deposits or coal seams (a coal deposit is a geographical location containing mineable accumulations of coal while a coal seam is entrapment of coal in underlying rock).
• India has the fifth-largest coal reserves in the world, and CBM has been looked at as a clean alternative fuel with significant prospects.
• India’s CBM resources are estimated at around 92 trillion cubic feet (TCF), or 2,600 billion cubic metres (BCM).The Damodar Koel valley and Son valley are prospective areas for CBM development.