No list? Lifestyle factors that people can change to improve their health would be things such as: Physical Training (Physical Activity), Eating a healthy diet, going outside more, etc.
I hope this is the answer you were looking for and that it helps!! :)
False it is false since pollution isn't only in the city
The answer is most likely than, it is because the poor does not acquire large sum of money where in they could use to ensure safety in terms of their health. Such as having enough money to have regular check ups, vaccines or medicine. They would likely spend the money that they acquire to food and shelter because it is more essential to them. That is why they are prone to have or acquire diseases than the affluent.