Someone has predicted that if tobacco ceases to exist on earth someday, the world may go into chaos. This statement seems exaggerated, but the harm of tobacco must not be underestimated. 【纠错】tobacoo更正为tobaccoEarth,开头大写。on Earth,现今较为通俗说法。On the Earth (the Earth特指)coflicts更正为conflictssomeone has predicted that if there is no tobacco on the Earth, there will/may be conflicts in the world. (范式:if there is...., there will be...) It seems to be an exaggeration,but the harm of tobacco cannot be underestimated. (is underestimated是说已被低估), (范式:if there is...., there will be...) there 重复,形式单调乏味,修饰其中一个if tobacco stops its being on the Earth, there will/may be conflicts in the world.if there is no tobacco on the Earth, the world will run into conflicts.你好!someone has predicted that if there is no tobacoo on the earth ,coflicts are on the way in the way.It seems to be an exaggeration,but the harm of tobacoo is underestimated.仅代表个人观点,不喜勿喷,谢谢。