Speaking
at
the
Cambridge
Energy
Research
Associates
(Cera)
event
in
Houston,
BP
chief
executive
Tony
Hayward,
Royal
Dutch
Shell
top
boss
Jeroen
van
der
Veer
and
Mike
Dola,
a
senior
vice
president
with
ExxonMobil,
said
energy
efficiency
could
play
a
key
role
in
plugging
a
forecast
gap
in
energy
supplies.
Other
industry
leaders
made
similar
calls.
But
the
industry
also
partially
shifted
the
blame
for
the
globe’s
thirst
for
volatile
energy
supplies
on
consumers
–
both
great
and
small.
Executives
also
highlighted
advanced
biofuels,
higher
mileage
cars,
new
engines,
mass
transit
and
other
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