When the mice were given pure air again, they returned to normal within less than 30 minutes.

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Even more than pure air and nice views, they would like jobs.

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They fill the container with pure air made by evaporating liquid nitrogen and liquid oxygen, and add water vapour and some trace gases.

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Wrapping my coat around me, I went outside into the cold pure air of the winter morning, careful not to slip on the icy steps.

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Two other techniques, called gasification and oxy-combustion, work by reacting coal with pure oxygen rather than air, and thus produce exhausts that require little treatment before burial.

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Many Alaskans revel in the biting air and the pure white of the winter landscape, not to mention the skiing, ice-climbing and snow machine-riding.

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And then, neutralizing gravity with love and pure will, they remained suspended in air inches below the ceiling, and they kissed each other for a long, long time.

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Goalkeepers have complained about balls moving in the air too much but Ballack's free-kick was pure power and was still rising as it hit the top corner.

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