and it's not just that the carbon dioxide we are releasing 不仅是因为我们释放出的氧化碳
changes in the Earth's orbit, ocean currents, and carbon dioxide levels 地球轨道、洋流 和二氧化碳水平的变化
Carbon dioxide levels had bounced back, 二氧化碳水平回升
The fatal freeze was caused by a 60% drop in carbon dioxide. 致命的冰冻 是由二氧化碳减少60%所导致
That releases its carbon into the soil rather than the air. 将释放出的碳排入地下而非天空
A greenhouse gas 20 times more powerful than carbon dioxide. 一种比二氧化碳厉害20倍的温室气体
As the trees burn, they release carbon dioxide. 树燃烧时释放出二氧化碳
The concentration of carbon dioxide... 近几十万年以来
In a few decades, the carbon that made our atmosphere a furnace, 数十年间 碳就会使我们的大气变为熔炉