This paper addresses problems related to transferring market concepts to no
nmarket domains. More specifically it is about fallacies following from the
use of the commodity concept in environmental valuation studies. First of
all, the standard practice tends to misconstrue the ethical aspects related
to environmental choices by forcing them into becoming ordinary trade-off
problems. Second, the commodity perspective ignores important technical int
erdependencies within the environment and the relational character of envir
onmental goods. These are all properties that have made many such goods esc
ape the commoditisation pressure of markets in the first place. Further, it
is shown that these interdependencies are the source of some of the ethica
l dilemmas observed. Finally, inherent characteristics of the environment t
end to make the concept of the margin, so indispensable to economic calculu
s, either difficult or irrelevant to define. The commodity 'fiction' twists
the perception of the environment from systems preservation to items use o
r transformation. This is a problem of increased importance as we approach
potential systems perturbations.