Acid
rain
____________________
____________________
by
burning
coal
or
oil
.
When
either
fuel
is
burned
.
It
releases
poisonous
gases
which
____________________
____________________
up
into
the
atmosphere
and
sometimes
____________________
long
distances
.
Over
3
,
000
research
projects
____________________
____________________
carried
out
to
look
into
acid
rain
,
and
a
decision
to
tackle
the
problem
____________________
been
____________________
in
most
of
the
western
European
countries
.
Measures
have
been
taken
in
Scandinavia
and
in
Central
Europe
to
____________________
the
pollution
before
it
dumped
on
the
environment
,
and
a
diplomatic
campaign
has
been
____________________
to
convince
other
countries
that
the
problem
has
to
be
____________________
as
a
major
ecological
threat
.
'Five
years
ago
this
issue
was
not
being
____________________
seriously
,
'
says
one
leading
environmental
group
,
'but
now
that
damage
has
been
____________________
in
large
areas
of
forest
and
lakeland
,
our
politicians
are
____________________
____________________
to
take
action
.
This
problem
must
____________________
____________________
quickly
:
if
governments
do
nothing
,
they
____________________
be
____________________
in
two
or
three
years'
time
with
the
accusation
that
they
have
____________________
our
forests
to
die
.
'A
major
international
initiative
to
combat
acid
rain
is
____________________
in
the
near
future
.
