The jury is still out, though fossil charcoal shows that forest fires were common at the time.
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。
Etched into ceilings of the mine shafts is the largest intact fossil forest ever seen—at least four square miles of tropical wilderness preserved 307 million years ago.
深深烙在矿井顶部的是迄今为止最大的、完整无缺的化石森林——这片3亿7百万年前被保存下来的热带原野至少有四平方英里之大。
Tropical forest trees are absorbing about 18% of the carbon dioxide added to the atmosphere each year from burning fossil fuels, substantially buffering the rate of change.
每年化石燃料燃烧产生并排放到大气中的碳排放，有18%被热带森林吸收了，大大减缓了碳排放的增加速率。
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