The intent of this credit is to reduce heat islands (thermal gradient between developed and undeveloped areas) to minimize impact on microclimate and human and wildlife habitat. The requirement is to use highly reflective/high emissivity roofing for a minimum of 75% of the roof surface; or install a vegetated roof for at least 50% of the roof surface; or a combination of both for the entire roof area. Concrete with high SRI can be used for roofing and concrete structural systems are ideal for supporting the heavy loads of vegetated roofs. This credit is worth 1 point.