Europe Doesn't Have Enough Energy

Europe doesn't have enough energy to heat their homes this year in Germany, the UK and France. So they are turning on their coal plants. Energy has a density. The lowest form would be like biofuels are done. You have to burn a whole building worth to get enough energy. Wood needs a ton of wood and it's also very pollutant. Coal has more energy in it. I need to burn way less coal than I would firewood. And then you have oil. So I need way less oil than I would coal because energy density and it's way less pollutant. Then you have natural gas and then you have uranium. But because Germany can't get the gas