25/08/2011 (Agence Europe) - Merger: Total Énergie Developpement/ Tenesol. On Thursday 25 August 2011, the European Commission gave the go-ahead to the acquisition of sole control over Tenesol by Total Energie Développement, a subsidiary of Total S.A. Total is a French group mainly active in the fields of natural gas and oil production, refining and marketing of oil products, petrochemicals and speciality chemicals. Tenesol is also a French company active in the design, manufacture and...