The construction of large-scale wind farms has been proposed as a key solution to reduce reliance on fossil fuels. However, a closer examination reveals that wind energy may not be as environmentally beneficial as often claimed. Three major concerns undermine its viability. First, wind turbines pose a significant threat to bird and bat populations. Studies have shown that collisions with turbine blades cause hundreds of thousands of bird deaths annually, including migratory species and raptors. This disrupts ecosystems and accelerates biodiversity loss, especially in areas along migration routes. Second, wind farms require vast amounts of land, which often leads to habitat fragmentation. For example, a typical 100-megawatt wind facility needs about 20 to 30 square kilometers of land, clearing forests and altering natural landscapes. This not only displaces wildlife but also reduces the land’s capacity for carbon sequestration, thereby offsetting some of the climate benefits of wind power. Third, the intermittent nature of wind energy forces utilities to rely on backup power from fossil fuel plants, such as natural gas, to ensure grid stability. These backup plants are often kept in standby mode, burning fuel inefficiently and emitting greenhouse gases even when not fully operational. Consequently, the net reduction in carbon emissions is far smaller than expected, undermining the argument that wind farms are a clean energy panacea.
🎧 听力讲座
🎯 模拟考试环境：先点「播放讲座」听完内容，再作答。听力原文默认隐藏。
The lecture challenges the reading’s claims about wind farms, arguing that these problems are either exaggerated or solvable with modern technology and careful planning. First, regarding bird and bat mortality, the professor points out that while collisions do occur, their impact is minimal compared to other human-related causes, such as building collisions, domestic cat predation, and pesticide use. Moreover, recent innovations like radar-based detection systems and painting turbine blades with UV-reflective patterns have been shown to reduce bird strikes by up to 70%. Thus, wind farms are not a primary driver of wildlife decline. Second, the land-use argument is misleading because wind turbines occupy only a small footprint; the land between turbines can be used for agriculture or conservation. In fact, many wind farms coexist with cattle grazing and crop farming, and some studies show that such dual-use practices can enhance biodiversity by preserving open spaces that are otherwise converted to urban development. Third, the intermittency issue is being addressed by advances in energy storage. Large-scale battery systems, pumped hydro, and even hydrogen storage now allow excess wind power to be stored and released when wind speeds drop. Furthermore, modern grid management integrates diverse renewable sources—wind, solar, hydro—so that the need for fossil fuel backup is rapidly diminishing. Therefore, the reading’s pessimistic conclusions do not reflect the current trajectory of wind energy technology.
📝 ライティング指示 Summarize the points made in the lecture, being sure to explain how they cast doubt on the specific points made in the reading passage.
📊 TOEFL Integrated Writing Rubric
Content Accuracy: Accurately capture the relationship between lecture and reading
Information Completeness: Cover all key counter-arguments from the lecture
Structure & Coherence: Logical organization and progression
Language Use: Grammar, vocabulary, expression accuracy
Scored 0-30 based on holistic scoring (original 0-5, scaled to 30).
