June 21st, 2007
On June 21, 2007 Kenneth Acks, CEO of the Cost-Benefit Group presented "A Framework for Analyzing the Costs and Benefits of Green Roofs: Second Stage Results” before the United States Society for Ecological Economics (USSEE) conference in New Yrk (see www.ussee.org/PDFs/Program_Book_June_21_2007.pdf)