Why are people living longer? Nowadays, people are living longer and longer A lot of people may reach the age of 100 years old in today`s world, while the average length of life is only 40 years in the nineteenth century There are a lot of factors that cause this interesting phenomenon Among countless reasons, there are three conspicuous aspects as follows First of all, much more advanced technology is the main factor for this phenomenon to occur With the development of technology, people nowadays can be easily saved from some of the diseases that were considered to be incurable in the past For example, previously, people suffered from missals, smallpox, and mumps due to the lack of highly developed technology At that time, a lot of people were killed by these diseases and it was common believed that those diseased could never be healed Since vaccination has been invented nowadays, people can simply go to the hospital and take a shot if they are infected with those diseases Obviously, technology has prevented people from a lot of possible deaths Also, the environment, which has strongly affected people`s health, is improved and a lot of serious environmental problems no longer exist Nowadays, most people have realized that the bad environment is really harmful to people`s health A lot of efforts have been made to change this situation, which accounts for the lengthening of people`s lives Last but not least, the improving quality of food plays a vital role in lengthening people`s lives When we prepare food today, we usually not think about the cost of the food but the nutritious quality of food, while people in the past didn`t even have enough food and some of them starved to death Currently, people not only have enough food but also have access to more nutritious food This greatly increases the possibility to survive In a word, taking into account of all these factors, it is not surprising that people can live much longer now As the technology continues to develop and the environment and food quality continues to improve, I am convinced that people will live longer and longer in the future