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In page Peat:

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Peat can be used as fuel once dried. Traditionally, peat is cut by hand and left to dry in the sun. In many countries, including Ireland and Scotland, peat was traditionally stacked to dry in rural areas and used for cooking and domestic heating. This tradition can be traced back to the Roman period.[1] For industrial uses,[citation needed] companies may use pressure to extract water from the peat, which is soft and easily compressed.