McDonald's isn't healthy?

Today in class we started to learn about the Worlds population and Life expectancy. We saw a chart that looks a little bit like this:


We looked over the chart (it was only to 7 billion) and noticed how there was a big boom in the population because of the baby boom. The baby boom happened after World War II when all the men from war came back to their loved ones, and the economy was booming, so they decided to have lots of babies. In our generation we are having fewer babies because women in our period are now working and going to college, and do not have time to be a mother. Mr. Shick asked us if he thinks our generation will survive longer than his will. I don't know because you never know what kinds of medical technology's people will come up with, but also kinds of harmful things people will come up with that could harm us like vaping and fast foods. We never know what the future will hold, but all we know is that there might be less babies.