Independent task : Declination of Birds' Population

The passage and the lecture discuss on the declination of the population of the birds in the United States. The passage states that growing human populations, use of agriculture lands and use of pesticides have diminished birds’ population. The lecture, however, refutes the passage and states various arguments in opposition.

First, according to the passage, growing human population and settlements have restricted natural habitats of the birds and as a result their population is reduced. In contrast, the lecture argues that some birds’ population has been really increased because of urban developments in the city areas. It is true that some bird’s population has been declined also, but others have been flourished better due to urban growth. Thus, the lecture opposes th passage because declination is not apply to all birds.

Second, the passage claims that in response to growing human population, wild area has been turned in to agriculture land. ON the other hand, the lecture disclaims that today in the United States,because of imtroduction of improved agriculture techniques, people can grow more crop in small unit of the land. Therefore , destruction of habitats of the birds would not be the case in the future. Thus, this point of the lecture also contradicts the passage.

Lastly, the passage mentions that the high demand of agriculture has increased the use of chemical pesticides that have harmful effects on the bird’s population. On the contrary, the lecture asserts the point that people are now more aware about the use of the pesticides. They have made two changes, one is to use less toxic pesticides and another most important change is to develop a genetically paste resistant crops. So these two changes in pesticides will not be harmful to the birds at all in the future. Thus, this point is also dismissed by the lecture.

TOEFL listening lectures: A university lecture by a professor of Animal Behaviour

Hi Kattie, I don’t have access to the lecture here, but you seem to have covered the topic very well. You did have quite a few issues with your usage in this one though - please see my comments below.