The CSPA provides a network of resources to arts organizations, which enables them to be ecologically and economically sustainable while maintaining artistic excellence.
http://www.artsandecology.org.uk/home Not just about theatre.
Arts & Ecology mentions the book 'Theatre Materials: What is theatre made of?
Eleanor Margolies, editor
published by Centre for Excellence in Training for Theatre/Central School of Speech and Drama (CETT)
Can't find it at the usual sources but am following up.