In a thickly forested park bordered by apartment blocks and a playground, a dozen workers were busy on a recent day with chain saws and axes, felling trees, cutting logs and chopping them into firewood to be stashed in concealed sheds around Lviv, the largest city in western Ukraine.Ironworkers at a nearby forge are working overtime to produce wood-burning stoves to be stored in strategic locations. In municipal depots, room is being made to stockpile reserves of coal.The activity in Lviv is being played out in towns and cities across Ukraine, part of a nationwide effort to amass emergency arsenals of backup fuel and critical provisions as Russia tightens its chokehold on energy supplies across Europe.As President Vladimir V. Putin slash …
