CARSON CITY, NV, July 26, 2018 (GLOBE NEWSWIRE) -- Pharmagreen Biotech, Inc. (f/k/a Air Transport Group Holdings, Inc.), (OTC PINKS: AITGD), a cannabis biotech company focused on producing cannabis starter plantlets through its proprietary tissue culture process is pleased to announce that its wholly owned Canadian subsidiary, WFS Pharmagreen Inc., is currently completing its pre-construction phase of its 62,000 square foot cannabis biotech complex. WFS Pharmagreen has file