Cathedral has weathered London’s acid rain

Where St. Paul’s Cathedral now stands in London, previous cathedrals had fallen to fire, Viking raiders, and war. The current structure, designed by Christopher Wren in the late 1600s, withstood direct hits by German bombers during World War II, but it’s been succumbing to a more insidious challenge—acid rain.

That environmental attack is abating, however. On Sept.