谁可以帮我改下我的英语文章 语法 病句什么的Smoking have negative effect

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建议：如果使用启动了拼写检查功能的Word,起码打字错误是可以避免的.里面有许多打字错误,当然语法错误也不少.可以将两个版本分别存入Word,然后比较一下,就知道我给你做了哪些修改.
Can you visualize what the world would be like if no one smokes?It would be wonderful.Smoking has negative impact in many ways.Nowadays,more and more people start smoking.Smoking affects our life in many negative aspects,health,waste of money,corruption and environment problems.
First of all,human’s health is threatened by smoking.For example,5 million people die from smoking every year,because smoking is the leaving cause for lung cancer.Also,indoor smoking also produces second-hand smoking,affecting other non-smokers,and researches have shown that second-smoking also kills a lot of people every year.On the another hand,smoking is always an addiction.The nicotine in cigarettes works like a narcotic drug.So,smokers can’t control themselves.Indeed