This book serves as a comprehensive directory and analysis of environmental grantmaking foundations operating in 1999. It aims to provide researchers, non-profit organizations, and philanthropic professionals with a detailed overview of the landscape of environmental philanthropy at the turn of the millennium. The work likely details the scope, focus areas, and funding patterns of these key organizations.

This directory is likely regarded as a valuable, albeit dated, resource for understanding the history of environmental philanthropy. Its utility would be primarily for historical research or for organizations seeking to understand past funding trends. While specific critical reviews are not readily available, its nature as a foundational directory suggests it was intended as a practical reference tool for its time.