When
you've
got
a
thousand
animals
to
____________________
____________________
,
you
need
a
lot
of
clean
water
.
Here
in
?
Emmen
Zoo
?
they
looked
at
nature
solution
____________________
____________________
water
and
imitated
it
.
All
waste
is
collected
for
treatment
in
an
accelerated
computer
control
____________________
,
the
water
is
naturally
purified
using
the
____________________
of
plants
,
algae
and
fish
.
The
forth
returning
to
be
used
again
.
This
____________________
cycle
of
renewal
cleans
half
a
million
litres
of
water
____________________
with
zero
waste
and
as
any
of
its
residents
will
testify
,
it's
not
just
the
environment
that
____________________
.
GREEN
DESIGN
AIMING
FOR
ZERO
EMISSION
S
