The earth may have sufficient oil to supply our needs for centuries to come.

FORBES: Fact and Comment

But some analysts question whether Russia will have sufficient reserves to supply the gas pipeline, given the expected decline in its production over the next 20 years and the lack of investment in new fields since the collapse of the Soviet Union in 1991.

BBC: Struggle for Central Asian energy riches

It also wants the UK to be more self-sufficient for its energy, so it doesn't have to rely on other countries to supply our power and is less dependent on volatile and increasingly expensive global gas and oil prices.

BBC: Energy bill Q&A

There are any number of reasons to expand money supply, but the most relevant ones of late have been to ensure that there is sufficient credit to stabilize the financial system.

FORBES: Spiking Oil Prices: It's The Investors, Stupid