Smog is harmful to our health有关雾霾、环境污染危害身体的英语演讲由刀豆文库小编整理，希望给你工作、学习、生活带来方便，猜你可能喜欢“雾霾环境”。
Smog is harmful to our health
Chris
#Introduction
Good morning, ladies and gentlemen!My topic today is “Smog is harmful to our health”.According to the American Lung Aociation, your lungs and heart can be permanently affected by air pollution and smog.If we inhale too much smoggy air, it may lead to different types of short-term health problems, here, I will cover 3 points:
First of all, smog may lead to coughing and throat irritation.Then, smog may lead to chronic diseases.Lastly, smog may lead to lung damage.#Body
I have talked about 3 types of health problems, then I am going to give you some proofs:
Firstly, smog may lead to coughing and throat irritation.A study of 10 adult men exposed to.12 ppm ozone for 6.6 hours , found that lung function decreased and coughingincreased over the more than six hours of exposure.Secondly, smog may lead to chronic diseases.David Abbey, doctor of Loma Linda University, studied a group of 6,340 people.Results of the study suggest long term exposure to air smog may increase the risk of chronic diseases by about 33%.In addition, it may higher the risk of developing some form of cancer.Thirdly, smog may lead to lung damage.In a study done on rats, continuous exposure to smog caused restrictive lung disease.While removal of the smog can reverse the disease state back to normal.#Conclusion
In conclusion, I have talked about 3 points.First of all, I talked about coughing and throat irritation.The more vigorous your activity level, the greater your chances of experiencing respiratory problems.Then, I spoke about chronic diseases.Please remember it’s neceary to limit your outdoor activities as ozone levels rise to unhealthy levels.Lastly, I told you about lung damage.Please remember to wear a mask while the air is smoggy.
