Mankind faces " a planetary emergency " , he said ; " a crisis that threatens the survival of our civilisation and the habitability of the earth . "
他说人类正面临“星球危机”,“一个威胁着人类文明延续和地球可居住性的紧要关头”。
The speed of climate change may also help , reckons paul romer of new york university , if broader shifts in habitability occur slowly enough to allow a relatively smooth geographic adjustment .