The Economist   The air breathed by an average Pole may not be Europe’s dirtiest. According to the European Environment Agency, Balkan nations like Serbia do worse on metrics like years of life lost per person. However, Poland’s effluvia stand out for their geograph

The Economist   Covid-19 is not all bad, as any city-dweller who stepped outside this year will have seen. The virus has killed hundreds of thousands of people...