Today, in our environmental science lecture, we will 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 insulation. However, the initial cost of setting up such a garden is high, and maintenance requires daily watering unless a drip irrigation system is installed. Interestingly, a recent study in Chicago found that community gardens not only improve local food access but also increase property values within a 500-meter radius by about 7%. Yet, the main challenge remains the availability of land in dense cities, which is why vertical farming is gaining popularity, though it is more energy-intensive.
❓ Según la conferencia, ¿cuál es el principal desafío para la agricultura urbana en ciudades densas?
A. A. El alto costo inicial de instalar jardines en azoteas
B. B. La necesidad de riego diario sin un sistema de riego por goteo
C. C. La disponibilidad limitada de tierra en áreas densamente pobladas
D. D. El aumento en el valor de las propiedades que afecta a los residentes locales
✅ 正确答案
C. The limited availability of land in densely populated areas