Emma will eat more fast food and have a shorter life expectancy.
When her grandmother was younger there was no such thing as fast food, additives, processed food and food that was produced through unhealthy means. They ate real home cooked food from real ingredients and more than likely ate most of their meals together as a family. Their lifestyle would also have been more active and healthier.
The level of oxygen in the blood...
the level of carbon dioxide in the blood...
the level of oxygen in the alveoli...
the shape of the alveoli...
the shape of the lungs....