教授在听力部分中认为阅读文章中的论点不准确。首先，尽管某些鸟类的数量正在减少，但大多数鸟类的数量正在增加，因为人类为鸟类提供了更多的栖息地。其次，新的作物不断被引入美国，这些作物每单位土地可以生产更多的食物，同时农业用地面积在美国正在减少，因此农业不会像阅读中提到的那样进一步破坏鸟类种群。最后，化学杀虫剂已经发生了改变，它们不再像以前那样有毒，且设计了更多抗虫作物来对抗害虫，这些作物对鸟类没有害处。
The professor in the listening part thinks the arguement in the reading passage is inaccurate.
First of all, though some birds' population is shrinking, most birds' number population is growing. Because humans privide birds with more habitat. For instance, pigeons and other birds number is increasing.
Secondly, new crops, which can produce more food per unit of land, continue to introduce to the United States every year. At the same time, the area of agriculture land is decreasing in US. So the agriculture would not result in the further destruction of birds population as the reading mentions.
Thirdly, the chemical pesticides are changed in two ways. They are no longer as poisonous as they used to be. They are less poisonous. Furthermore, more pest-resistant crops are designed in order to fight against the pest. These crops are genetic resist to pests and don't have any harm to birds.
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