Skyrocketing prices for natural gas have Europeans scrambling for alternative energy sources. In Germany, where households face a 480 euro rise in their gas bills, people are resorting to stockpiling firewood.  The fallout from Russia’s invasion of Ukraine has sunk Europe into the worst energy crisis in decades. From Italy to the UK, governments are racing to replace natural gas supplies from Russia and curtail the higher costs for industry and households. But consumers, too, are having to adapt, from cutting back on showering to firing up the chimney.  The German word for firewood, “brennholz ...