> climate change isn't a threat to life on earth as we know it But there is plenty of evidence that it is. Peter Ward has done some great work (and plenty of g

> climate change isn't a threat to life on earth as we know it But there is plenty of evidence that it is. Peter Ward has done some great work (and plenty of geologists agree) that most of the planets mass extinction events are triggered by rapid rises in CO2 leading to abrupt climate change and mass die offs. The big difference with our current situation is that the CO2 is being released much faster than in previous extinction events.