The Great Smog must be firmly in the past: our City will display exemplary air quality Chris Hayward Seventy years ago this week, five days of toxic air brought London to a standstill. Flights were grounded, cars abandoned, and trains cancelled. The “Great Smog” – as it became known – descended on the capital, as smoke and noxious fumes from coal fires, vehicles, and factories mixed with fog and mist. Initial estimates suggested [...]