Ensuring secure, affordable supplies of energy is a matter of growing global importance. The challenges ahead include: the depletion of oil and other fossil fuels; the reliance of most countries on foreign energy sources; global distributional conflicts arising from the rapidly growing demand for exhaustible fossil fuels; and geopolitical conflicts arising from the political instability of exporter countries, from exporters using their market power for political purposes, or from terrorism funded by petrodollars. |  |