I
think
overpopulation
is
a
big
problem
because
it
makes
____________________
change
worse
.
This
has
several
negative
effects
.
First
,
the
increase
in
temperatures
make
ocean
level
____________________
.
This
causes
terrible
____________________
that
kill
people
and
animals
.
If
we
want
to
save
the
____________________
,
we
must
slow
population
growth
and
____________________
environmental
problems
.
