A sustainable development perspective on urban-scale roof greening priorities and benefits
arxiv(2024)
摘要
Greenspaces are tightly linked to human well-being. Yet, rapid urbanization
has exacerbated greenspace exposure inequality and declining human life
quality. Roof greening has been recognized as an effective strategy to mitigate
these negative impacts. Understanding priorities and benefits is crucial to
promoting green roofs. Here, using geospatial big data, we conduct an
urban-scale assessment of roof greening at a single building level in Hong Kong
from a sustainable development perspective. We identify that 85.3% of
buildings reveal potential and urgent demand for roof greening. We further find
green roofs could increase greenspace exposure by ~61% and
produce hundreds of millions (HK$) in economic benefits annually but play a
small role in urban heat mitigation (~0.15C) and annual
carbon emission offsets (~0.8%). Our study offers a
comprehensive assessment of roof greening, which could provide reference for
sustainable development in cities worldwide, from data utilization to solutions
and findings.
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