1. 18 Lesson 18 Unintended consequences Listening: Human Interference


Work in pairs. Read the statem ents and put them in order they come in the record. Listen again and check


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Work in pairs. Read the statem ents and put them in order they come in the record. Listen again and check.

__On hearing that information Chinese leader Mao Zedong ordered the extermination of sparrows.
__The overflow of insects, plus the added effects of widespread deforestation and misuse of poisons were a significant contributor to the Great Chinese Famine (1958-1961) in which an estimated 30 million people died of starvation.
__Humanity did a lot of mistakes in past but they should serve us as a good lesson.
__Nests were torn down, eggs were broken, chicks killed, and sparrows were shot down from the sky.
__On the advice of the Chinese Academy of Sciences, Mao declared full-stop to the Great Sparrow Campaign.
__Consequently, agricultural yields that year were disastrously low.
__But the story to be told today, we hope, will be a lesson for what can happen when changes are made to an ecosystem.
__They swarmed the countryside as there were no sparrows in sight.
__They reasoned that sparrows ate grain seeds.



__By 8 pm of that night, it was estimated that a total of 194,432 sparrows were killed.


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