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Carl-Gustav Pettersson (two 'S's and two 'T's) was a senior executive with a building corporation, Nisses, which was a Scandinavian constructor. They ran major building projects in Sweden and in the UK (Millbank). He was commonly known as "C-G" or "Ziggy" in tobacco industry circles, and his companies were part of the worldwide IAQ testing scam.
C-G Pettersson and his wife also owned an IAQ testing company known as REDAD and at one time they owned the name Healthy Buildings Limited. They also had a close relationship with Gray Robertson and Peter Binnie of Healthy Buildings International, which was originally known as ACVA Air Conditioning and Ventilation Associates Robertson and Binnie were so successful in their dealings with the American tobacco industry that they began franchising their system of conducting fake testing of Indoor air in offices and public buildings around the world. Both REDAD and Nisses certainly had a business connection to the Robertson/Binnie indoor air testing company ACVA (aka ACVA Atlantic).