世界能源展望2003，To the best of my knowledge,no previous attempt has been made by any
organisation to build a comprehensive and authoritative picture of future
investment needs,worldwide,in all parts of the energy-supply chain.This is
the task which has been undertaken by the team,under Fatih Birol,responsible
for the World Energy Investment Outlook 2003.It is my pleasure to
acknowledge the work of this team and the contribution made by a wide circle
of collaborators,wider than ever before,drawn from international
organisations,energy companies and the financial community.
The total figure which emerges for the required global investment over
thirty years is enough to make anyone pause:$16 trillion.No one claims that
this figure will be precisely validated in thirty years time.Indeed,policy-
makers will have failed if the energy economy has not been reshaped to make
it more sustainable.But the figure is well enough founded to establish an order
of magnitude for the task ahead.