Alleviating Urban Heat Island Effect: based on the "Green Roof" Project Policy

The urban heat island effect is one of the biggest climate problems faced by cities around the world in their development process. Establishing a 'green roof' can lower local temperatures, save energy costs, and reduce urban stormwater runoff, which has many benefits for mitigating the urban heat island effect. The author found through analyzing the incentive or mandatory measures taken by four typical cities in the United States to carry out green roof projects that: on the one hand, various measures have played a strong role in promoting the development of green roof projects; On the other hand, in the process of policy implementation, there have also been issues such as insufficient assessment of local ecology and a one-sided emphasis on “distributive justice” while neglecting “environmental justice”.