Lune, which aims to change this by offering an API and software tools to make it easy for any business to integrate climate impact into their customer experience, has closed a $4m funding round led by early-stage VC Crane, with participation from 15 reputable angel investors, including Maximilian Tayenthal (co-founder of N26), Fredrik Hjelm (co-founder of Voi) and Tony Jamous (co-founder of OysterHR & Nexmo).