The principle of subsidiarity through its re-affirmation in the Treaty
of Maastricht became an integral and central part of European constit
utional law. Its relationship to ecological issues, however, has so fa
r not been explored. Subsidiarity is a general principle of organizati
on. It can apply to all areas of policy: financial, agricultural, tech
nological, education, defense, economic development and, e.g, environm
ental policy. The principle of subsidiarity is silent about the specif
ic purpose, direction or content of a particular policy.Whatever be th
e purpose of any such policy, the principle of subsidiarity requires t
hat it be carried out within that context which is the smallest viable
one in which the objective can successfully be attained. When a task
is too complicated for a small unit such as an office or a firm to be
successfully performed, that unit has to be augmanted to the point whe
re the task can be effectively performed. Likewise, if an organization
is too large to successfully handle particular problems as its proced
ure may be too cumbersome or as it lacks sufficient detailed informati
on or experience repeated recurrences of problems it has tried to sett
le, then a different organizational form must be found, preferably an
existing one, which is closer to the problem at hand and able to carry
out the policy. With the shift in responsibility will also travel the
access to resources with which to carry out the task. Since ecologica
l units rarely co-incide with political units, the principle of subsid
iarity poses a specific challenge to politicians and administrators wh
o have to decide on assignments of tasks and responsibilities as well
as funding within the different echelons and among the different Membe
r States of the European Union. This essay explores those tasks and, i
n particular, advances the notion of establishing ecological tax units
.