(TrendHunter.com) The Guinness regenerative agriculture program is being launched by the Diageo-owned brand as a three-year endeavor that will see it taking a decidedly more sustainable approach to farming barley for... (TrendHunter.com) The Guinness regenerative agriculture program is being launched by the Diageo-owned brand as a three-year endeavor that will see it taking a decidedly more sustainable approach to farming barley for...