Having personally met and attempted to discuss Islam with the author Rianne, I feel sure she is sincere in her beliefs, but her reluctance to engage in even the slightest discussion with those she disagrees with speaks volumes, and indeed is characteristic of my consistent experience of trying to discuss with Muslims in general about Islam.
Chapter 59 of the Qur'an begins with Allah's commentary on Mohammed's military attack against the Jewish citizens of Bani-Nadir at the start of his ethnic cleansing of Arabia. The Qur'an is the perfect book by all-powerful Allah so it is difficult to understand without such contextual explanation. But you can see for yourself in the following quotes (from the respected Pickthall translation) that it endorses:
(1) attacking a town that is trying to defend itself (rather than attacking Mohammed et al).
(2) expelling all the inhabitants into destitution;
(3) confiscating their property (which non-Muslims would consider to be theft);
(4) uprooting their food trees in order to force the defenders out (which most non-Muslims would consider to be eco-terrorism);
(5) surprising them by breaching the pre-Islamic moral code that food trees in a desert area are not to be the subject of such damage.
Qur'an chapter 59, "Exile": 2-7
"He it is who hath caused those of the People of the Scripture [Jews] who disbelieved to go forth from their homes unto the first exile. Ye deemed not that they would go forth [= go forth to battle], while they deemed that their strongholds would protect them from Allah. But Allah reached them from a place whereof they reckoned not, and cast terror in their hearts so that they ruined their houses with their own hands and the hands of the believers. So learn a lesson, O you who have eyes!!" [= one of many terror threats from Islam]
"And if Allah had not decreed migration for them...."
"...and whoso is opposed to Allah, verily Allah is stern in reprisal."
"Whatsoever palm-trees ye cut down or left standing on their roots, it was by Allah's leave, in order that He might confound the evil-livers [=non-Muslims]."
"And that which Allah gives as spoil unto his messenger from them, ye urged not any horse or riding camel for the sake thereof [i.e. you didn't do any work to earn or produce them], but Allah giveth His messenger lordship over whom He will. Allah is able to do all things."
"That which Allah giveth as spoil unto His messenger from the people of the townships, it is for Allah and His messenger, and...."
Rianne is stated to be an outstandingly energetic and well-informed person and yet she has never found so much as a second of time to respond to these extremely relevant quotes from this supposedly most sacred, perfect, book. Until such time as she does, I question what credibility there is in her purporting to have any expertise about Islam or its being environmentally-friendly.