11.
With reference to two nonconventional energy sources called ‘coalbed methane’ and ‘shale
gas’, consider the following statements: (UPSC / IAS 2014)
1. Coalbed methane is the pure methane gas extracted from coal seams, while shale gas is a
mixture of propane and butane only that can be extracted from fine-grained sedimentary
rocks.
2. In India abundant coalbed methane sources exist, but so far no shale gas sources have
been found.
Which of the statements given above is/are correct?