No, countries do not need to move away from gas even if you're convinced CO₂ is the cause of all our woes. What you'd want to move away from is natural gas, not gas in itself. There are plenty of other ways to get methane - which is what natural gas is (more or less) - which do not add CO₂ to the environment. Domestic waste can be fermented for local production, industrial, agricultural and forest-industry waste for larger-scale installations. Methane is a good energy carrier given the ease at which it can be transported and handled. It is not poisonous, it can be compressed and/or liquefied and it burns cleanly without the need for complex burner designs.