Are really people longer now?

Recently, some media have been published some surveys which show that people are longer now, but there are a lot of people who claim that people lived more in the past. Well, what is the true statement? Why do people live more? What are the causes?

"Because food is not poisoned with so many artificial products, water and air pollution were more in touch with nature. In addition they were less people and the leaders were not worried about overpopulation.
Today there are too many, not the earth, but for economic and political system, therefore dispose of some subtly using medicines, injections, fluoridated water, etc."

This is the statement of Jane, she claims that people lived more in the past, possibly thanks to the pollution of the Earth. Nowadays people live under greater stress, going everywhere in a hurry, and that affects our body.

On the other hand, we find opinions like Mark's statement:

"Now living longer thanks to the prevention, of course accompanied by a large improvement in the health services offered, as well as insurance programs that entitle people to receive care throughout the community. Things that do not setoman in mind, so to say people were more "ignorant" on health issues."

Nowadays we have at our disposal a lot of means which permit us prevent illness and virus.
We have more information and the means to prevent and fight disease.

Although it does not only depends on the historical time in which we live as long as we do. If we born in the north of Africa, probably we won't live the same that a baby who borns in the North of America, since in North America there are more facilities to live than in the North of Africa.

Now we have a lot of resources to live more, is it in our hands use them properly and use the resources to help other people in underdeveloped countries that can not get it so easily.

Cristina