In 2019 McFarland & Co. published my book, Embracing Philanthropic Environmentalism: the Grand Responsibility of Stewardship. Some of the posts in this environmental section are related to this book. I assume many writers accumulate a pile of “post-book” notes and references containing updates, new evidence, and some reconsiderations. Partly this stems from ongoing interest, but also a practical matter regarding any future editions, for it is far easier to gather new material as the years pass rather than going back and trying to find it all after the fact. In any case, the post-book collection accumulated faster and more voluminously for EPE than any other non-fiction book I’ve written. I’ll try to keep the EPE references to a minimum, but this is just a note to let you know that this was the volume that generated or inspired some of the posts in this environmental section. The book, of course, has many more references; copious endnotes and a lengthy bibliography.