BrewDog, one of the largest Scottish craft breweries, is officially the first carbon negative beer brewery in the world. This, thanks to an investment plan and green actions to contribute to the fight against climate change. These include the start-up of a biogas plant at the brewery’s Ellon plant, fuelled with waste from the beer processing, which will not only convert production wastewater into clean water, but will also produce biomethane, organic fertilizer and CO2 for food use. All this is perfectly reintegrated into the company’s business cycle, creating a true virtuous model compatible and capable of being adopted in other similar businesses.