Assertion: peat | /r/ObjectUse | used for century
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Source sentences:
text: Though peat and peatland in northern Asia and Europe has been used for centuries, albeit mainly for energy purposes, it was not until 1895, when Koorders published a description of extensive tropical peat forests in Sumatra (Indonesia), that it was established beyond doubt that peat soils could be formed under a tropical climate, and that they actually covered considerable areas (Polak 1952).