Dutch airline KLM has begun powering some commercial flights on an eco-friendly fuel mix that includes 25% cooking oil and 75% jet fuel.

BBC: Cooking oil powers transatlantic flights

Flight AC991 from Toronto to Mexico City is expected to generate at least 40 per cent fewer emissions by using jet fuel derived from recycled cooking oil and through other fuel-saving measures, making it the most environmentally-friendly flight ever flown by Air Canada.

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Neither of these products can be directly distilled into gasoline or fuel oil (kerosen, jet, and diesel) or indeed any other conventional petroleum product.

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Valero Energy , a refiner that processes lower quality crude oil into products like gasoline and jet fuel.

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The firm said it had also been hit by warm weather, which reduced demand for heating oil, and lower sales of jet fuel as the aviation industry struggled to recover from the aftermath of 11 September.

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The prices of refined products like diesel, gasoline and jet fuel, might increase much more sharply than crude-oil futures because of the refining belt that runs along the Gulf.

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In 2004, gasoline accounted for 46.8% of refinery yields, distillate fuel oil accounted for 23.9% and jet fuel accounted for 9.7%.

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Houston-based Kinder Morgan operates and owns approximately 24, 000 miles of natural gas pipelines, 8, 000 miles of pipelines that transport refined petroleum products such as gasoline, diesel and jet fuel, and more than 2, 000 miles of pipeline that transports crude oil.

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The hiatus in air travel could be a rehearsal for a post-jet age if the peak oil theory is correct and we are facing a future with insufficient fuel to put into planes.

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