"The guess is that both the water and the dark material, which we think is organic-rich material, were delivered by the same objects impacting Mercury: some mixture of comets and the kinds of asteroids that are rich in organic and volatile material like water ice, " Prof Solomon said.

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Labor costs, as well as volatile raw material expenses, badly impaired the business.

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The one important fact is that fracturing of an individual well emits relatively small amounts of volatile compounds, the material of concern, and some wells emit none at all.

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The Commission attributed the slowdown to lower global demand, higher material costs, a volatile financial market and tight credit conditions in China.

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The technique works by focusing high-powered microwaves on plant-based material, transforming the tough cellulose molecules of the plant matter into volatile gases.

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Nahmias said that authorities found the material last week -- with the aid of maps drawn by Rudolph -- and it was too volatile to be removed, so explosives experts destroyed it onsite.

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