Comparision of green roofing to conventional roofing

This is an Evaluation report about the comparison of Green roofs to Conventional roofs.This report needs to contain the types, cost, and life expectancy of both types of roofing. there needs to be at least two pages discussing both types of roofs and a conclusion portion. It should be written as if a reader has no formal experience with the topic. It should utilize quotes and paraphrases. It needs at least 6 sources.