森林大火真正起因于地球排气中易燃还原性气体在腐殖层的临界积聚（气体体积分数大约为5%~6%）。现场气体（H2，CO）系统测量结果证实了这一点。
The regional forest fire is actually caused by critical accumulation ( up to about 5 ~ 6 vol. % ) of reductive gases from Earth degassing in forest floor , which is revealed by our field H_ 2 and CO measurements .
腐殖层