In recent years there has been an interest, partly renewed but largely new, for the development of economic activities which deal, more or less directly, with the environment. Resisting the idea that the greening of the economy in our country (but not only in our country) mainly concerns the energy sector and more specifically the photovoltaic, it seems interesting to confront economic actors working in different product fields (from agriculture to informatics) with a common interest around "environmentally sound" labour practices. We asked to five small enterprises acting in the Marches region to debate around the ideas and practices of the new green economic sector.