You
may
well
ask
why
science
did
not
warn
us
of
global
warming
sooner
;
I
think
that
there
are
several
reasons
.
We
were
from
the
1970s
until
the
end
of
the
century
____________________
____________________
the
important
global
problem
of
stratospheric
ozone
depletion
,
which
we
knew
was
manageable
.
We
threw
all
our
e
?
orts
into
it
and
succeeded
but
had
little
time
to
spend
on
climate
change
.
Climate
science
was
also
neglected
because
twentieth
?
century
science
failed
to
recognize
the
true
nature
of
Earth
as
a
____________________
self
?
regulating
entity
.
Biologists
were
so
carried
away
by
Darwin's
great
vision
that
they
failed
to
see
that
living
things
were
tightly
coupled
to
their
material
environment
and
that
evolution
concerns
the
whole
Earth
system
with
living
organisms
an
____________________
part
of
it
.
Earth
is
not
the
Goldilocks
planet
of
the
solar
system
sitting
at
the
right
place
for
life
.
It
was
in
this
favourable
state
some
two
billion
years
ago
but
now
our
planet
has
to
work
hard
,
against
ever
increasing
heat
from
the
Sun
,
to
keep
itself
____________________
.
We
have
chosen
the
worst
of
times
to
add
to
its
di
?
culties
.
