In
order
for
our
____________________
to
function
____________________
and
____________________
to
occur
normally
,
the
air
that
reaches
our
____________________
must
be
____________________
and
in
good
____________________
.
Currently
,
it
is
very
difficult
to
____________________
this
due
to
____________________
.
The
____________________
____________________
discharged
by
motor
____________________
and
____________________
affect
our
bodies
,
since
they
____________________
air
____________________
and
fill
the
air
with
pollutant
____________________
.
These
particles
make
it
difficult
to
____________________
and
can
cause
serious
____________________
____________________
.
Furthermore
,
there
are
____________________
and
viruses
in
the
air
,
which
can
make
us
____________________
.
However
,
our
bodies
have
____________________
mechanisms
to
ensure
that
the
____________________
of
the
____________________
-
____________________
with
which
we
are
in
contact
on
a
daily
basis
do
not
affect
us
.
There
are
also
pollutant
gases
inside
our
houses
,
one
of
which
may
be
____________________
____________________
,
if
any
members
of
your
family
smoke
,
or
____________________
caused
by
poor
____________________
in
the
____________________
.
