Why are people living longer? As is suggested by the statistic data, people are generally living longer now There are a number of causes of such a phenomenon, and I would like to some of the premier ones as follows The first and foremost cause of our longer life is the development of science of technology To illustrate this point, one example is very persuasive The invention of CT has made it possible to find out the diseases of the patients in advance, therefore gain time in curing them, while in the past, many people died even not knowing the cause Another equally significant cause is the emphasis people have paid on their health condition An example to support this point is that more and more people go to hospital regularly, not because of disease, but for examinations Such examinations have greatly reduced the possibility of falling ill, for they warn people of bad signs and help them take measures in time In addition, people now have more appropriate diets, which also much good to their health, therefore enable them to live longer Finally, the improvement of the environment of the earth does play an important role With the fresh air, clean water, blue sky and green grass, people can really enjoy their lives and keep in a good mood, which is very important for their health as suggested by the researches There are still many other causes of this phenomenon, but the obvious ones have been presented as above And we are ensured to expect to be able to live still longer in the future