The document provides a summary and recommendations from the Cook County Sustainability Advisory Council. It finds that building energy accounts for 67% of greenhouse gas emissions in Cook County. It recommends that Cook County establish an overall goal of reducing greenhouse gas emissions by 80% by 2050. It also recommends Cook County focus first on reducing emissions from building energy through energy efficiency improvements in county facilities. These recommendations are aimed at helping Cook County become more environmentally, socially and economically sustainable while saving money for taxpayers.