These days people are living longer. Why?

Answer:

In my opinion, people are living longer because there have been a lot of advancements in medical field. In recent years, scientists have taken big steps towards research on new medicine. Doctors have applied more effective treatments than ever before. For example: Tuberculosis was one of the most formidable diseases that killed many victims in the past but now it could be controlled.
In addition, medicine prices are much lower than before, so many people in poor countries could be able to afford their medical care. For example: In African, Aids patients are provided with free medicine that help them live for a very long time despite Aids is still incurable.