According to Green Architects sustainability is all about durability of spatial interiors and environments, economic flexibility and social diversity. Sustainable and Green means the starting point for creating artificial unities fitting in a balanced based system called nature of man and its living environment. The fundament of our society is based on the interaction and interventions of nature. Sustainability is not a question; it is a necessity for solving the development problem. It is not a matter of our time, but a parameter for artificiality within nature. Sustainable concepts, take into account the spatial, economical and social-cultural diversity and flexibility. Green Buildings or urban interventions are not only successful by the way we deal with materials, but also contributes to a lively (urban) environment, generate energy, are flexible and can adapt to economic needs. Our expertise concerns the implementation of economic interesting interventions in the public domain of the city.Green Architects explores the meaning of sustainability, its definition, its implementation and its advantages. Green Architects makes several distinctions between:- Multifunctional use of the same material through modular systems- Flexibility through generic floorplans and layouts- Self sufficient buildings thanks to generating energysystems- The concept of Feed the City, not only do buildings generate energy, but also they do generate food.