Clashes in Khartoum have turned deadly as two rival military factions fight for power. As the conflict escalates, a transition to civilian rule could be in jeopardy. Europe’s cities have a worrying pollution problem and clearing the air is proving difficult. And a new way to measure the environmental impact of food.For full access to print, digital and audio editions of The Economist, try a free 30-day digital subscription by going to www.economist.com/intelligenceoffer Hosted on Acast. See acast.com/privacy for more information.