That's why many balloon retailers are mixing air or other safe, alternate gases with helium to extend the supply through this shortage.

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It works by forcing fuel directly into the combustion chamber of each cylinder to mix air and gas simultaneously at the point of combustion, rather than mixing air and gas in a separate chamber like more conventional engines.

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Its spicy tang floods the air, mixing with the scent of roasted nuts being stirred by an elderly woman and the sweetly rotting smell of a spiky durian fruit being cut with a hatchet.

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At higher altitudes the air is potentially warmer and heats the air nearer to the surface by mixing with it.

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Its four buildings, designed by Branson Coates Architecture, resemble drums when seen from ground level but from the air they look like dials on a sound-mixing desk.

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As with the earlier paper that showed that offshore windmills will lower the air temperature around them by 1 degree or so: I assume from that same mixing increasing the evaporation rate of the sea water.

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