The government has recently unveiled an initiative called SATAT (Sustainable Alternative Towards Affordable Transportation) to promote CBG (Compressed BioGas) as alternative fuel. Consider the following statements with respect to CBG (Compressed BioGas):
- CBG can be naturally produced and does not need mining
- Most of the content of CBG is methane
- One of the main challenges of CBG is that it has substantially less calorific value than CNG (Compressed Natural Gas)
Which of the above is / are correct statements?