Montreal-based travel app Hopper’s co-founders Frederic Lalonde and Joost Ouwekerk, along with former Airbnb CFO Laurence Tosi, have raised $10m for a carbon removal start-up called Deep Sky. The new business aims to build large-scale infrastructures in Canada to capture carbon emissions at scale. Deep Sky’s network of partners, which includes Captura, Mission Zero, Skyrenu, and Carbyon, will help assemble existing technologies on the market to develop facilities that capture CO2 molecules from the open air and oceans and bury them underground. The start-up aims to raise $50m next year to select a site to build a pilot project.