惰质组包括丝质体(化石木炭)、源自真菌残体的菌类体，以及含氢低、高反射率的其他高碳物质。
Inertinite includes fusinite (fossil charcoal), sclerotinite derived from fungal remains, and other high-carbon materials with a low-hydrogen content and a high reflectance.
答案依然悬而未决，尽管木炭的化石表明森林大火在那时是很普遍的。
The jury is still out, though fossil charcoal shows that forest fires were common at the time.
“这包括使用液化石油气，但是也有其他方案，例如沼气、木炭和经过处理的煤饼”。
These include liquefied petroleum gas, but also alternatives like biogas, managed charcoal and processed briquettes.
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