This article reviews the epistemological debates about functionalism in ecology. While identifying current area of scientific validity, t emphasizes, in particular, that functionalism depends on the system examined and remains inapplicable wherever singularity prevails. 

The economic agent was previously assumed to be distinct from its environment and that nothing was forcing him to act on it. With the ecological crisis, every agent appears to be inserted into an environment, which he modifies in an irreversible way without even having decided to do so. This changes in depth the...

While the ecological crisis is usually presented as a confrontation between mankind and nature, there remains a third term that it is imperative to keep in mind: technology. Technology appears as made up of two fronts, which must be considered jointly: mediation with nature, and mediation with man himself.

How could the burden of GHG emission reduction be shared among countries? The article address this arguably basic question by purely statistical methods that do not rely on any normative judgment about the criteria according to which it should be answered.