The authors do not fall into the green talibanism provided, and it is true that many recipes contain palm oil. An insert is specifically dedicated to this oil, which has very interesting properties in soap, but the monoculture replace primary forests in Southeast Asia is a disaster. Personally I think the use of palm oil bio outcome of family farms is more eco-friendly than oil sunflowers grown large pesticide reinforcements!
I always consult regularly this book, because even if I rarely recipes to the letter, there is always an inspiration. Warning: this book is contagious!