Today, in our environmental science lecture, we'll discuss the impact of urban farming. One key point is that rooftop gardens can reduce a building's energy consumption by up to 25% because they provide natural insulation. However, the initial cost of setting up such a garden is often high, and maintenance requires regular watering, especially in dry seasons. A study in Chicago found that community gardens also improve local air quality, but they need at least two years to show measurable effects. So, while the benefits are clear, planning and investment are crucial.
❓ Согласно лекции, в чём заключается основное преимущество садов на крышах?
A. A. Они снижают потребление энергии, обеспечивая теплоизоляцию.
B. B. Они требуют очень мало воды после установки.
C. C. Они немедленно улучшают качество местного воздуха.
D. D. Они недороги в установке на начальном этапе.
✅ 正确答案
A. They reduce energy use by providing insulation.