Songdo
is
a
South
Korean
city
being
built
on
____________________
land
.
It
is
also
a
technologically
____________________
city
,
with
electric
water
taxis
-
tubes
that
suck
rubbish
directly
to
a
central
processing
facility
and
millions
of
electronic
wireless
____________________
everywhere
that
transmit
____________________
to
a
control
room
.
Medellin
used
to
have
one
of
the
highest
crime
____________________
around
the
world
,
but
due
to
initiatives
,
crime
has
dropped
by
eight
____________________
.
One
part
of
the
solution
is
____________________
cars
.
The
main
____________________
is
to
integrate
the
poorer
areas
into
the
city
.
