人类物种轨迹与拥有四十亿年历史的生物地球化学系统紧密相连，上述系统反复影响着从细菌、城市规划、大气含氧量到造纸厂在内的星球环境。
Our trajectory as a species is hardwired to this four-billion-year-old bio-geo-chemical system that has profoundly worked and reworked the planetary environment, all the way from bacteria to city planners, atmospheric oxygen to paper mills.