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如果人类突然消失了,地球将是怎样一番光景? 生态系统能否维持?庞大的工业化世界将剩下什么?纵观历史,从古文明遗址到自然灾害肆虐下的现代世界,我们找到了回答这些问题的线索

Depending on whether not they could escape from their confinement , then things change dramatically because you might have lions or you might have tigers, both of the two are  probably capable of surviving and posting humans period. They do better for themselves than they may would do in Washington DC. But neither are animals that are perfectly capable of figuring out how to do it and how to survive. Zoo animals may be the great unknown.. But there are things we can know for sure about life 20 years after people are gone because there is one spot on the globe where it's already happened. It's 20 years into a life after people. Without humans to apply fresh paint and filling cracks, even concrete buildings have already begun to crumble. Lack of maintenances turn cities into *ghost towns. Animals that had long avoided human population centers now return to make new homes among the decaying walls. How do we know these? Because there is one place in the world where it's already happened. We are standing in a centre square of Chernobyl Ukraine, a city that was once the most modern cities in the former SU. For 20 years now the city is been sitting in abandon and it really gives you a picture of what would happen if people are removed from a place of normal civilization. Evacuated after Chernobyl nuclear disaster, * went from a city of 50 thousand to a ghost town overnight. Dust -covered - schoolrooms remain as students left them just over 20 years ago. Vegetation pries part masonry as a crawl over the(去掉)buildings. An amusement park scheduled to open 4 days after the date of the accident remains never used. The park's fairies wheel accumulates rust rather than riders.