In
an
extensive
interview
with
Rolling
Stone,
Obama,
who
will
almost
certainly
face
Republican
Mitt
Romney
in
the
autumn,
says:
"I
suspect
that
over
the
next
six
months,
this
is
going
to
be
a
debate
that
will
become
part
of
the
campaign,
and
I
will
be
very
clear
in
voicing
my
belief
that
we're
going
to
have
to
take
further
steps
to
deal
with
climate
change
in
a
serious
way."
He
was
responding
to
a
question
about
the
climate
impacts
of
the
Keystone
XL
pipeline,
which
would
carry
oil
from
Canadian
tar
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