城市化英文作文
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Disadvantage of urbanization:

The Great Smog of 1952 in London

When a thick fog engulfed London from December 5 to December 9, 1952, it mixed with black smoke emitted from homes and factories to create a deadly smog. This smog killed approximately 12,000 people and shocked the world into starting the environmental movement. soup fogs, were not shocked to find themselves surrounded by such thick smog. Yet, although the dense smog did not instill panic, it nearly shut down the city from December 5 to December 9, 1952.

Visibility across London became extremely poor. In some places, visibility had literally gone down to one foot, meaning that you couldn't see your own feet when looking down nor your own hands if held out in front of you. Transportation across the city came to a standstill(瘫痪) and many people didn't venture outside for fear of getting lost in their own neighborhoods. At least one theater was closed down because the smog had seeped inside and the audience could no longer see the stage.

It wasn't until after the fog lifted on December 9 that the deadliness of the smog was discovered. In the five days the smog had covered London, over 4,000 more people had died than usual for that time of year. In the following weeks, approximately 8,000 more died from exposure to what has become known as the Great Smog of 1952. Most of those killed by the Great Smog were people who had pre-existing respiratory problems and the elderly. The death toll of the Great Smog of 1952 was shocking. Pollution, which many had thought was just a part of city life, had killed 12,000 people. It was time for change. It was the black smoke that had caused the most damage. Thus, in 1956 and 1968, Parliament passed two Clean Air Acts, which began the process of eliminating the burning of coal in both people's homes and in factories.