TPO 17
According to the passage, the growth of human populationand increase of agriculture and pesticide use have detrimental effect on birds,which apparently refutes the points illustrated in the lecture.
First, the passage says the natural habitats for birdswill continue to disappear due to the expansion of human population andsettlements. As a result, the bird population will decrease. On the contrary, theprofessor contends that the urban city would not affect the growth of birds andit would provide better and larger habitats for other types of birds. So city dwellersoften complainabout the increase the population of seagulls at landfills, pigeons on the streets and so on .Even Birds like hawk and falcon which prey on the pigeons and rodents canbe found in cities. So, the populationof birds would not decline , although some populations may shrink, other typesof birds would increase.
Second, the reading asserts that The growth ofagriculture will lead to the furtherdestruction of bird habitats which are converted to agriculture use. Incontrast, the professor claims that now the United States is using less andless land for agriculture every year. They introduce a new productive cropswhich will produce more food on the land per unit. . As a result, there is noneed to destroy wildnessareas.
Third, the reading claims that chemical pesticide usewill continue to increase, which does harm to bird population. On the otherhand, the professor indicates that the government is increasing the awarenessof the consequence of using traditional pesticide. There are two changes. First,they develop the new and less toxic pesticide, which is very important. Second,more importantly, there is growing trend to develop more pest resistant crops which aregenetically designed to be unattractive to the pests. Pest resistant corpsgreatly reduce the need for chemical pesticide. As a result, pest resistantcorps do not harm birds at all.
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