French agriculture is now facing a double challenge, environmental and productive. Following the Grenelle environment forum (organized by French government in 2007), ecologically intensive agriculture (EIA) has emerged as a new concept to reach this dual challenge. The large Agricultural Cooperative TERRENA in western France chose to refer to the EIA as a structural element of its business strategy. The aim of this paper is to present an economic approach of the emerging concept of EIA, and its implementation by the cooperative and its members