Интегрированное письмо TOEFL

📖 Текст для чтения

The construction of large-scale solar power plants in desert regions has been proposed as a key solution to global energy demands. While this approach seems environmentally friendly, three major concerns undermine its viability. First, desert solar farms require vast amounts of water for cleaning and cooling solar panels, especially in arid regions where water is already scarce. For example, a typical concentrated solar power plant can consume up to 20,000 gallons of water per megawatt-hour, straining local water supplies. Second, the installation of solar panels disrupts fragile desert ecosystems. The ground disturbance and shading from panels alter soil temperatures and microclimates, harming native species such as desert tortoises and certain plant communities that rely on specific thermal conditions. Finally, the intermittent nature of solar energy—due to nighttime and cloudy weather—demands expensive energy storage systems or backup fossil fuel plants. These additional costs and infrastructure requirements reduce the economic appeal of desert solar projects, making them less competitive compared to other renewable sources like offshore wind.

🎧 Лекция

The lecture challenges the reading's claims about desert solar farms. First, the water concern is overstated. Modern solar technologies, particularly photovoltaic panels, require minimal water for cleaning—only occasional rainfall or dry brushing suffices. Concentrated solar plants, which use water for cooling, can adopt dry cooling systems that reduce water consumption by up to 90%, albeit with a slight efficiency loss. This makes water scarcity a manageable engineering issue, not an insurmountable barrier. Second, while construction does disturb habitats, solar farms can be designed to coexist with local wildlife. For instance, raised panels allow animals to move underneath, and native vegetation can be planted between rows to preserve soil stability and provide shade. In fact, some desert solar projects have become refuges for threatened species by protecting land from more destructive uses like off-road vehicles or urban sprawl. Third, the intermittency problem is rapidly being solved by advancements in battery storage. Utility-scale lithium-ion battery costs have fallen by over 80% in the past decade, enabling solar farms to store excess daytime energy for nighttime use. Additionally, desert regions often have high solar insolation, meaning they generate abundant power during peak daylight hours, which can be paired with regional grids to smooth supply. Thus, the reading's objections are based on outdated assumptions.