Saturday, June 28 01:30 GMT (Friday, 16:30 PST) - BBC World News
The world burns 2.5 million barrels of oil every day just to power car headlights. Figures like this illustrate the huge need to find highly productive energy sources that don't emit toxic pollutants and greenhouse gases. Global energy consumption is on the rise and making a long-term break from oil, gas and coal is also a long way off; but new ideas, new sources and new ways of utilizing energy need to be looked at if we are to meet demand.