On 2014-11-18 at 11:46:51 +0100, Martin Koppenhoefer wrote:
> 2014-11-18 11:25 GMT+01:00 Elena ``of Valhalla'' <elena.valha...@gmail.com>:
> > * can be drinked after filtering
> "could be drunk after filtering": I guess almost everything can be
> filtered/decontaminated with adequate equipment, time and if money and
> energy are not an issue ;-)
> You'll need different filters for different kinds of contamination btw. ;-)

"could be drunk after filtering with commercially available portable 
filters of the kind commonly carried by backpackers" :)

AFAIK most such filters are designed for a limited and somewhat 
standard range of common pollutants (mostly bacterical, admittedly,
which overlaps with "can be drinked after boiling/sterilizing")

-- 
Elena ``of Valhalla''

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