在地球长达45亿年的历史长河中,经历了许多犹如世界末日的大灾难:火山爆发、流星撞击、大火和寒冰一度几乎彻底毁灭了这个星球上的所有生灵,甚至威胁到地球本身的存在。毒气云团笼罩地球1783年,冰岛拉凯火山爆发,毒气和熔岩喷射持续长达8个月之久,熔岩覆盖面积达500多平方公里。拉凯火山爆发产生大量的二氧 In the long 4.5 billion-year-long history of the Earth, it has undergone many catastrophes that resemble the doomsday: volcanic eruptions, meteoric strikes, fires and ice once almost completely destroyed all living creatures on this planet and even threatened the existence of the Earth itself . Gas clouds cling to the earth In 1783, Iceland’s Rakai volcano erupted, gas and lava sprays lasted as long as 8 months, lava covered an area of ​​over 500 square kilometers. Rakai volcano erupts to produce a large amount of dioxin