Feb 8, 2017
Creeping tendrils of smoke particles and sulfur dioxide wound their way through the fog already blanketing London on the evening of December 5, 1952. When it infiltrated the harmless fog, those dangerous invaders turned the mist into a lethal smog so thick you couldn't see an inch in front of you. Thousands would die before anyone would realize the effects of the smog on Londoners.