Concentration and containment
The principle behind this is diametrically opposed to the previous
approach, in that instead of relying on the pollutant becoming attenuated and
spread over a wide area, it is an attempt to gather together the offending
substance and prevent its escape into the surrounding environment.
The inherent contradiction
between these two general methods is an enduring feature of environmental
biotechnology and, though the fashion changes from time to time, favouring
first one and then the other, it is fair to say that there is a place for both,
dependent on individual circumstances. As with so much relating to the
practical applications of biotechnologies to environmental problems, the idea
of a ‘best’ method, at least in absolute terms, is of little value. The whole
issue is far more contextually sensitive and hence the specific modalities of
the particular, are often more important concerns than the more theoretically
applicable general considerations.
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