1. The London Smog Disaster of 1952. Early on 5 th of December 1952 the London sky was clear, the weather was considerably colder than usual, as it had been for some weeks. As a result the people of London were burning large amounts of coal and smoke bellowed from the chimneys. The winds were light and the air near the ground was moist, conditions ideal for formation of radiation fog .

2. What causes air pollution in cities?

5. The cleanest capital?

6. Wheezing Wales?

7. London Smog 1991 From the 12 th to the 15 th of December 1991 a mass of stagnant winter air settled over London trapping beneath it hazardous mixture of fumes and particles. It was estimated that this smog caused around 160 more deaths than normal for this time of year. Cardiovascular and respiratory deaths both increased, meaning only the most severe effects of the smog are shown by statistics. Long term effects such as neurological and cancers are also not considered in the smog’s death toll. (1)

10. Controlling pollution in Mexico City Day Plate Ending Digit Monday Tuesday Wednesday Thursday Friday and Provisional Circulation Permits.