<p>Natural gas has seen a rapid expansion since the 1970s as it has many attractive characteristics, including a low direct greenhouse gas emissions intensity. Many analysts have therefore seen it as a key &ldquo;bridge fuel&rdquo; to cushion the energy transition from coal and oil to renewables over the next decades. However, an increasing understanding that methane emissions in gas production and transportation are generally high, as well as the sudden realisation of the vulnerability of natural gas importers, as highlighted by the Russian invasion in Ukraine, has recently dimmed the prospect of natural gas.</p>
