"With the IBU, I see myself as a stakeholder. I want to look at what scientists tell us, and what politicians and social scientists say. I just want to look at it and say "these are the recommendations" - and what can we do to get close to them. Do we have to fly less? Do we have to reuse equipment more and repair? It's not always about knowing everything, it's about asking yourself the right questions [when it comes to the topic of sustainability]. I don't see myself as climate expert or a politician. I see myself as part of this bigger institution. Even if I don't have that much of an impact as an individual, the [IBU] as a whole does."