The paper discusses the position and role of environmental chemistry a
mong the other environmental disciplines. It discusses the various asp
ects of environmental chemistry and emphasizes the need for developing
fundamental studies in biophysical environmental chemistry in order t
o better understand the functioning of environmental systems. These sy
stems include a large number of various structures in the nanometer to
meter range which play key roles on compound fluxes and consequently
on the homeostasis of ecosystems and on their disturbance by anthropog
enic activities. Both structures and fluxes are presently ill-known an
d new concepts and methods must be developed in this field. For chemis
try, this is a challenging area where supramolecular structures and pr
ocesses play dominant roles. It is also a challenging field for the de
velopment of environmental sciences since detailed and sound physico-c
hemical processes are needed in macroscopic modeling of compound circu
lation in ecosystems. In addition, teaching this discipline to chemist
ry students would allow them to confront complex, structured real syst
ems. This paper also discusses the relationship between biophysical en
vironmental chemistry and the other environmental disciplines within i
ntegrated multidisciplinary studies. The structure used at the Faculty
of Sciences of the University of Geneva to favour a flexible but effi
cient integration is briefly described.