This is a casebook for an advanced law school course on the emerging law of green buildings. Everyone wants new buildings to be green and old buildings to be "greened." What will this mean for legal agreemens? What will be other legal consequences? Students identify and analyze types of green issues affecting every type of real estate transaction and construction project. They consider, also, legal and policy issues of green legislation which mandates compliance with green rules or creates incentives for green development and sustainability. In short, the course provokes answers to the question, "what is the role of the lawyer in the green revolution?" In short, in this course the students address green issues as lawyers.