Speaking
at
the
State
Department,
Clinton
said
Stern
will
serve
as
her
principal
advisor
on
international
climate
policy
and
strategy,
and
act
as
chief
US
climate
negotiator
at
the
United
Nations
and
other
multilateral
forums.
Stern
will
also
participate
in
all
climate
and
clean
energy
policy
discussions
involving
other
federal
departments
and
agencies
that
have
an
impact
on
carbon
emissions,
she
said.
Clinton
said
Stern’s
appointment
sends
``an
unequivocal
message
that
the
United
States
will
be
energetic,
focused,
strategic
and
serious
about
addressing
global
climate
change
and
the
corollary
issue
of
clean
energy.’’
She…