This special double issue of Theatre and Performance Design – dedicated to Ecoscenography – comes at a pivotal moment in time. As I write this today, world leaders are gathering for the 26th UN Climate Change Conference (COP26) in Glasgow, a meeting that is widely accepted as the world’s last chance to avoid catastrophic climate change. Leaders from across the globe are being asked to fundamentally change their ways of doing things. To commit to jettisoning older, outmoded technologies that damage our environment, and embrace new approaches. In turn, they are being asked to focus on the possibilities these new approaches bring with them, to see them not as a risk, an inconvenience or a constraint, but as an opportunity. This special double issue of Theatre and Performance Design is a microcosm of this broader global necessity. The edition invites theatre and performance makers to interrogate and critique the practices of the past and explore the opportunities that arise from this ecological turn.