This is a collection of vital quotes from many of the great minds of yesterday and today. All of these thoughts are expressions of concern and strategy relating to the well being of our planet and the continued sustainability of human life as we know it. The list has been separated into the six wide-scoped categories below. Or, if you prefer, you may search all of the quotes by keyword. New additions are being made to this database continually. Most of the citations at the end of each listing refer to the books in the suggested reading list.