Vaayu, the climate tech start-up that helps retailers reduce their carbon footprint in real-time, has closed an $11.5 million seed funding round led by Atomico, with follow on from CapitalT and participation from Reddit co-founder Alexis Ohanian’s firm Seven Seven Six, along with a select group of angel investors including Cristina Stenbeck, Chairperson of the Zalando Supervisory Board and non-Executive Director of Spotify and Bryant Chou, co-founder and CTO of Webflow.