Prince Charles delivered a speech on the environment to the world's leaders as a hologram before vanishing into thin air.
The Prince was reluctant to attend the summit in person because the flights for him and his entourage would have generated an estimated 20 tons of carbon waste.
In comparison the hologram is thought to have left a carbon footprint equivalent to a lightbulb, reports the Daily Telegraph.
It meant that the Prince could be seen in two places at the same time - in Abu Dhabi and visiting a former colliery in Ayrshire.
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