I didn't know that. It's surprising to me that they are able to have such a building "CO2 neutral". Is it actually technically possible or did they buy themselves off? If it's really possible, that would be amazing.
see an example https://www.swisslifearena.ch/arena... CO2-neutralen,direkt in der Arena verbraucht.
Unforutnately (in Germany) most of the rinks are owned by communities without a real concept how to improve the situation - reduce the energy consuption and increase the usage times of the rinks that an investment in the rinks would justify. And the power of German Fed and the associated clubs is close to zero.
I'm not knowledgable at all when it comes to this topic so I don't really understand the whole concept, but seems like they are still using a lot of energy from other resources, but try to use synergies as much as possible? What would happen to that "Abwärme" from the "Klärschlammverbrennungsanlage" otherwise? Great to see they are making this effort, but I don't understand enough to say much more.