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In general, people are living longer now. Discuss the causes of this phenomenon.
The development of science and technology gives an impressive revolution to the whole world. One of the most striking things is that people nowadays have much longer life expectation. Take the Chinese people for example, the mean life-span of Chinese is 73 years, which is unimaginable in the past. A number of factors could be accounted for this progress. As far as I am concerned, I prefer that the improvement in nutrition and sanitation is the critical to the longer life phenomenon.
Food and nutritions play important roles in enhancing the life expectation of mankind. The most fundamental need for human beings is the sufficient food and nutrition. For one thing, people could not to be expected to live without enough food supply. A great number of Chinese had to endure the hunger or even stavation 50 years ago, so the people might find it difficult to live in the world. However, with the development of argriculture and food technology, the Chinese people not only have solved the problem of shortage of food, but also have a lot of choices on food. For example, there are so diverse choices of food, such as rice, breads, meat and all kinds of fruits, so some even have some trouble choosing the food they like. For another, only food cannot guarantee us to live well and then live longer, the fruitful nutrition is more important to help us to derive a healthy life. For instance, if a man always eats vegetable all the time without any protein-contained food, such as pork and milk, even though the vegetables contain sufficient vitamins, it is difficult for him to keep healthy because the protein and some other nutritions are also very vital to live well. Nowadays, people could acquire more balanced nutrition, which is essential to expect a longer life. Thus, the revolution in food and nutrition is critical to the longer life expectation.
The modern sanitation condition and advanced medical treatment help people to prevent and cure the illness. First, superior sanitation condition is helpful to prevent us from getting illness. Most of us may have the experience that people could be more healthy if they care about the sanitation better. For example, modern people behaves sanitarily than ever before, such as the using some antiseptic to make their body clean, which will stop the invasion of some bacterias. Also, people have better aware of cleanness, the clean public service is a good example. Second, the revolution in illness cure is amazing. During the past several years, numerous of effective medicines have been discovered or invented to cure illness. The invention and widely use of insulin is a perfect example, millions of people who suffered from diabetes could alleviate the pain by the illness and in turn live longer. Third, some man-made appliances could be planted in human body, which is also a great revolutionary achievement. For example, the artificial heart could work well to help the patient who get a hearty illness. Also, some artfifile bones is effective to hope the disable to lead a normal life or even join in some sport activities. Therefore, the achievements in sanitary condition and medical treatment are effective to gurantee a longer life of people.
In addition, some other factors could also help people to live longer, such as the more leisure time and the less pressure from the workplace. Compared to the people in the past, people are living much longer now. From my perspective, I think the most important causes of this phenomenon could be attributed to the sufficient food and nutrition, the great imporvement of medical and so on. All of these are the necessary results of development in science and technology. |
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