The impact of air pollution on health has been well documented for centuries, but the deadliest smog in history has had some of the most devastating effects… — With countless lives lost, let’s look at what caused this smog, how it claimed lives, and how we can prevent similar events. From London’s Great Smog of 1952 to the Donora Smog of 1948, we explore some of the most deadly smog in history. Types of Smog