Comparative studies prove the existence of factors that modern generations of people to live longer than during the previous periods of time. The success of medicine is, perhaps, crucial, but research shows that we medical drugs, and some bacteria resistance to drugs, such as antibiotics. So, there is a danger of unbeatable infection in the future, but today, mankind through epidemics that thousands of lives. Even though severe climate and urban ecology a word to say too, many such places a remarkably high population of old people in good health. Most of them in good spirits and the moment they see the sun. Looking back at their lives, they say that they a healthy diet of fish, fruits, beans and vegetables, drinking pure water. It they have never done harm to their health themselves, while the inherited genes a good effect on their years even though their life was not a bed of roses in the past.

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Comparative studies prove the existence of factors that [enable|are enabling|have enabled|enables] modern generationsof people to live longer than during the previous periods of time. The success of medicineis, perhaps, crucial, but research shows that we [have overused|are overusing|overused|overuse] medical drugs, and somebacteria [develop|are developing|developed|have developed] resistance to drugs, such as antibiotics. So, there is a danger ofunbeatable infection in the future, but today, mankind [is surviving|survive|survives|has survived] through epidemicsthat [claim|are claiming|have claimed|claimed] thousands of lives. Even though severe climate and urban ecology[has|have had|has had|have] a word to say too, many such places [boast|are boasting|have boasted|boasted] a remarkably high populationof old people in good health. Most of them [are rising|have risen|rise|rose] in good spirits and [have rejoiced|rejoice|are rejoicing|rejoiced]the moment they see the sun. Looking back at their lives, they say that they[follow|followed|are following|have followed] a healthy diet of fish, fruits, beans and vegetables, drinking pure water.It [appeared|is appearing|appears|has appeared] they have never done harm to their health themselves, while theinherited genes [have|have had|are having|had] a good effect on their years even though their life wasnot a bed of roses in the past.