That link only talks about CO2 emission. When you include other greenhouse gases, mainly methane and methane leaks in the systems, gas becomes closer to coal, no longer under one half. Gas is about as bad as coal if you'd only count the CO2 from burning coal. But coal actually also releases methane into air, so including estimates of leaked methane for both gas and coal mining and transport, in this German study gas comes out 30% better than coal (Global Warming Potential 20 years time horizon), or 55% better (GWP 100 years horizon).
> https://www.eia.gov/tools/faqs/faq.php?id=74&t=11#:~:text=In...
That link only talks about CO2 emission. When you include other greenhouse gases, mainly methane and methane leaks in the systems, gas becomes closer to coal, no longer under one half. Gas is about as bad as coal if you'd only count the CO2 from burning coal. But coal actually also releases methane into air, so including estimates of leaked methane for both gas and coal mining and transport, in this German study gas comes out 30% better than coal (Global Warming Potential 20 years time horizon), or 55% better (GWP 100 years horizon).
https://www.nature.com/articles/s41598-021-90839-7