BIG founder Bjarke Ingels has begun to crowdfund to realise his steam ring system for the practice’s €470 million waste-to-energy ski slope in CopenhaBIG founder Bjarke Ingels has begun to crowdfund to realise his steam ring system for the practice’s €470 million waste-to-energy ski slope in CopenhaBIG founder Bjarke Ingels has begun to crowdfund to realise his steam ring system for the practice’s €470 million waste-to-energy ski slope in Copenha