托福official17综合写作生态学类Integrated Writing范文+题目解析

The passage claims that there will be fewer and fewer birds, but the arguments used to support this claim are unconvincing.First, it's true that urban growth has been bad for some types of birds, but urban development actually provides better and larger habitats for other types, so much so that city and suburban dwellers often complain about increased birds populations, seagulls at landfills, pigeons on the streets and so on. Even birds like hawks and falcons can now be found in cities, where they prey on the increasing populations of pigeons and rodents. Soit's not going to be a story of uniform decline of bird populations in the future. Some populations may shrink, but others will grow.As for agriculture, it's true that it too will increase in the future, but not in the way assumed by the reading passage. The truth is, in the United States, less and less land is being used for agriculture every year. Increasing in agricultural production have resulted from and will continue to result from the introduction of new, more productive varieties of crops. These new crops produce more food per unit of land, and as a result, there's no need to destroy wilderness areas.And third, while it's certainly true that traditional pesticides have been destructive to birds, it's incorrect to project this history into the future. Now that people are aware of the possible consequences of traditional pesticides, two changes have occurred. First, new and much less toxic pesticides have been developed, and that's important. Second, and perhaps more importantly there is a growing trend to develop more pest resistant crops, crops that are genetically designed to be unattractive to pests. Pest resistant crops greatly reduce the need for chemical pesticides. And best of all, pest resistant crops don't harm birds at all.