If Europe was a school student, last week it sat its first exam in Energy Savings 101. It failed. And that doesn’t bode well for much tougher tests to come in January. Despite strong imports of liquefied natural gas to replace Russian shipments, Europe needs to reduce gas consumption — by a lot — if it’s going to make it through the winter. Extra supply won’t be enough. Conservation is absolutely paramount. The exact amount varies from country to country, but on average, the European Commission has suggested a 10%-15% demand reduction. Germany and a few other nations, which in...