The Precautionary Principle
All forms of environmental risk should be tested
against the precautionary principle that means that
where there are real risks to the site, lack of
full scientific certainty should not be used as
a reason for postponing measures that are likely
to be cost effective in preventing such damage.
It does not however imply that the suggested cause
of such damage must be eradicated unless proved
to be harmless and it cannot be used as a licence
to invent hypothetical consequences. Moreover, it
is important, when considering whether the information
available is sufficient, to take account of the
associated balance of likely costs, including environmental
costs, and benefits (DETR, 1998).