地球或许最终可以承受20亿辆汽车,前提是要解决好出行需求与能源、环境之间的矛盾。如何解决?地球能负担得起20亿辆汽车么?至少目前不能。超过10亿辆汽车现在每天在地球上奔驰,这些四个轮子(或者更多)的机械正在诱发壮观的温室效应、吸干珍贵的石油资源,以及煽动争夺石油和城市道路的政治 Earth may eventually be able to withstand 2 billion vehicles, the premise is to solve the travel needs and energy, the contradiction between the environment. How to solve it? Can the Earth afford two billion vehicles? At least not for now. More than a billion cars are now running daily on the planet. The four-wheel (or more) machinery is inducing spectacular greenhouse effects, draining precious petroleum resources, and politics that fanfare oil and urban roads