Today, in our environmental science lecture, we will discuss the impact of urban farming on local ecosystems. One key point is that rooftop gardens can significantly reduce the heat island effect in cities. However, they also require careful water management to avoid runoff issues. For example, a study in Chicago showed that green roofs retained about 60% of rainfall, but only when the soil depth was at least 15 centimeters. Additionally, these gardens provide habitats for pollinators like bees, but they may attract unwanted pests if not maintained properly. So, while urban farming offers benefits, its success depends on design and maintenance.
❓ 강의에 따르면, 녹색 지붕이 강우량의 60%를 보유하기 위해 필요한 조건은 무엇인가요?