Tucked away between the overcrowded concrete jungle of Gulshan-i-Iqbal and the bustling Lyari Expressway that swirls over the dry Lyari River, was the humble farm of a 102-year-old organic farmer, Mahmood Futehally, and his wife Fatima. I was in my twenties when I met the inspiring couple for the first time. In July 2010, a…