A night at the opera is not typically equated with restraint, instead conjuring images of chandelier-filled theatres and arias performed in exquisite costumes against transportative stage sets. Yet, recent years have seen opera companies across the globe make a determined effort to operate more sustainably, implementing numerous strategies in a bid to reduce their carbon emissions and overall impact on the planet.

This is, in part, the result of climate activists, who have increasingly targeted the arts and entertainment industries over the past few years with the aim of drawing greater attention to their cause. At the end of 2022, for instance, responding to mounting protests, the Royal Opera House cut ties with its long-time sponsor, the oil giant BP. Yet, it is also a response to the shifting expectations of audience members: according to a UK study conducted in 2022, 77% of audience members now expect theatres to address the climate emergency in their work – and opera houses are no exception.

The pandemic, while posing innumerable difficulties for the live entertainment industry, also offered an important pause for reflection. It was during this time that a number of UK theatre-makers joined forces with sustainability experts to conceive the Theatre Green Book, a publication setting a common standard for sustainable theatre production, and providing guidance on how best to achieve it. Divided into three volumes – sustainable productions, sustainable buildings and sustainable operations – spanning the many facets of what it means to run a theatre, the acclaimed guide has already been widely implemented.