translation.en: This led Lee Kump, and others from Penn State and my group, to propose what I call the Kump Hypothesis: many of the mass extinctions were caused by lowering oxygen, by high CO2. And the worst effect of global warming, it turns out: hydrogen sulfide being produced out of the oceans.
translation.zh: 这使得来自滨州的Lee Kump和我团队的另外一些人 提出了我称为“坎普假说”的理论： 很多物种大灭绝都是由于氧气含量的降低， 以及二氧化碳浓度的增大。全球变暖最严重的影响就是： 海洋会产生硫化氢。