Near the end of last year, Niall Collins met up with Donal Daly. Collins was the chief executive of the Institute of Sustainability Studies (ISS), a sustainability training business, while Daly was the chief executive and co-founder of Future Planet, a sustainable business advisory firm. “We could see so many synergies between our two businesses,” Collins said.  “We are dealing with similar-size organisations who are concerned with their impact on the environment. There were also synergies in product offering. Future Planet has done a lot in software around strategy, data management, reporting and transition planning, while our focus in the…