<P> The Seattle Green Factor, a multifaceted system for urban landscaping, has seen much success in the mitigation of urban heat islands . The program focuses on areas that are prone to high pollution, such as business districts . There are strict guidelines for any new construction that exceeds roughly 20 parking spaces, and this platform helps developers physically see their levels of pollution while trying different methods of construction to figure out the most effective course of action . Seattle has correspondingly produced a "score sheet" for cities to use in their city planning . </P> <Ul> <Li> Urban heat islands increase demand for energy consumption during the summer when temperatures rise . As a result of increased energy consumption, there is an increase in air pollution and greenhouse gas emissions . This policy focuses on lowering greenhouse emissions, which contributes to lowering the heat island effect . </Li> </Ul> <Li> Urban heat islands increase demand for energy consumption during the summer when temperatures rise . As a result of increased energy consumption, there is an increase in air pollution and greenhouse gas emissions . This policy focuses on lowering greenhouse emissions, which contributes to lowering the heat island effect . </Li> <P> This compendium focuses on a variety of issues dealing with urban heat islands . They describe how urban heat islands are created, who is affected, and how people can make a difference to reduce temperature . It also shows examples of policies and voluntary actions by state and local governments to reduce the effect of urban heat islands </P>

What factors account for the urban heat island