With reference to two non- conventional energy sources called 'coalbed methane' and 'shale gas', consider the following statements: 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?

1. Statement 1 is incorrect. Coalbed methane (CBM) is primarily methane (CH4) extracted from coal seams, but it may contain other gases like ethane, carbon dioxide, and nitrogen; it's not necessarily pure methane. Shale gas, extracted from fine-grained sedimentary rocks (shale), is also predominantly methane (CH4), often with smaller amounts of other hydrocarbons like ethane, propane, butane, and condensates, as well as non-hydrocarbon gases. It is *not* just a mixture of propane and butane. 2. Statement 2 is incorrect. India does have abundant coalbed methane sources, and commercial extraction is underway in some areas. However, India also has significant potential shale gas sources, identified in several sedimentary basins like Cambay, Krishna-Godavari, Cauvery, and Damodar Valley. Exploration activities have been initiated, even if large-scale commercial production hasn't commenced widely. It is incorrect to state that no shale gas sources have been found. Therefore, neither statement 1 nor 2 is correct.