- "How did we arrive at a state in which the balance of world energy supply and demand could be so fragile that weather, not to mention individual acts of sabotage or local insurrection, could have a significant impact on economic growth?" – Alan Greenspan, 2005
- "Critical international security goals, including countering nuclear weapons proliferation, supporting new democracies, and promoting sustainable development are at risk because of over-dependence on fossil fuels. This dependence also presents huge risks to the global environment." – Richard Lugar, 2006
- "It is extraordinary that a century into the age of oil, with the global economy dependent on $3 trillion worth of this black liquid each year, we don’t even know how much is left." – David Manning, 2006
