To really know what makes a great city work,you have to ppel back its skin and expose its secret life force.A system of incredible complexity in technology of millions depend on ,but few understand.A fantastic voyage now begins a journey deep inside the world's megacities.
It's the world's biggest city.It covers more than 1400 square kilometers.Its population density is greater than New York City,Tokyo or London.But for the nearly 18 million people who live here it's not just another metropolis.Mexico City is grounds zero.On one side,one of the world's most earthquake-prone hot spots.On another,one of the world's most active volcanos and beneath their feet,the shaky foundation of an ancient lake bed.The mother nature,Mexico City is one big target, at any moment,the big one could heat.
瞬间报警声音响起,他们只有60秒的时间转移到安全的地方。但墨西哥城的孩子们却好像在玩耍一样。但是对于成年人来说,那是很严肃的问题。在1985年他们经历过真实的事情。