Pollution
,
an
urgent
problem
for
the
planet
The
____________________
of
our
environment
is
one
of
the
most
worrisome
____________________
controversial
events
.
Earth
is
a
unique
planet
in
the
solar
____________________
.
With
an
incredible
____________________
of
life
,
man
does
not
realize
that
he
has
an
unrepeatable
gift
____________________
which
to
develop
his
____________________
.
The
issue
of
____________________
of
our
____________________
is
not
something
new
,
but
it
could
be
said
that
today
its
study
requires
special
____________________
.
Why
?
Simply
because
now
more
than
ever
man
is
polluting
.
Several
studies
by
experts
have
shown
that
air
,
soil
and
sea
pollution
in
the
last
hundred
____________________
has
been
greater
than
that
produced
in
several
centuries
of
history
.
