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
And with oxygen levels 60% higher than they are today, 当时的氧气水平比今天高60%
Carbon dioxide levels had bounced back, 二氧化碳水平回升
If sea levels continue to rise faster and faster, 如果海平面上升的速度持续加快
If it melts, sea levels will rise by nearly seven meters. 如果全部融化 海平面将会上升7米
Water levels in the catchment lakes along its course... 流域中的蓄水湖泊水位