Make Earth Great Again: Scan this unique code and we’ll plant another tree in the Brewdog Forest. Visit brewdog.com/tree to find out more about how we can all save the planet. One beer at a time. Buy one get one tree. Certified B Corporation. Make Earth Great Again: Scan this unique code and we’ll plant another tree in the Brewdog Forest. Visit brewdog.com/tree to find out more about how we can all save the planet. One beer at a time. Buy one get one tree.