Aviation officials feared the dust could stop jet engines - an unacceptable hazard - and Ms McDonagh was among the thousands left stranded.

BBC: Ryanair plane taking off from Barcelona - file pic

Hyundai had already suspended production of diesel engines at its Ulsan plant and warned earlier on Tuesday it could also have to stop production of petrol or gasoline engines.

BBC: South Korea police break up Yoosung Hyundai strike

Along with the changes to aerodynamics and engines, this was introduced to stop the alarming escalation in cornering speeds and lap times that has accompanied the tyre war between Bridgestone and Michelin.

BBC: SPORT | Motorsport | Formula One | New look F1 promises extra action

Search engines are continually evolving their algorithms to stop the manipulative techniques SEOs use on websites to increase search visibility.

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Domino was put in a container on the floor of the car deck in a gap between a wall and a bicycle storage area, with a mat underneath to stop the container getting hot from the ferry's engines.

BBC: Ferry's animal care is questioned

Now, it's true that amazing gains are being made in the efficiency of internal combustion engines, both gas and diesel: direct injection, cylinder deactivation, stop-start, eco-mode throttle mapping, to name a few of the recent applied technologies.

WSJ: Ford C-Max Hybrid Energi: The Bawdy Electric

Automakers have been achieving incremental improvements in the efficiency of their conventional engines with new technologies like direct-injection, six-speed transmissions, turbochargers and start-stop systems.

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