**Spring to Winter 2026 dates now available to book.** Hosted every other month, this webinar is free, and open to anyone in the performing arts sector. Theatre Green Book is for students, freelancers, and anyone working for an organisation making theatre, dance, opera, circus, live art, outdoor performances or anything inbetween. The webinars will be held in English, and are open to anyone from across Europe and internationally. The webinar will be useful to anyone looking to start using Theatre Green Book Production Calculator tracking tools. It's likely to be particularly useful to Production Managers, Co-ordinators, General Managers, and anyone with responsibility for tracking Theatre Green Book productions. If you have used Theatre Green Book in the past, you may have used the Materials Inventory: the Production Calculator is a an updated version of it. There will be time for questions during the session, and, availability permitting, we will have guest speakers who have had recent experience of using the trackers themselves. Please join us - we love to find out more about everyone who is making environmentally mindful work!