I value my health, which is why I always wear a P2 mask when crossing busy roads
![air pollution](https://www.ausdoc.com.au/wp-content/uploads/2022/08/airpollution_dreamstime_m_109696717-aug2019-1.jpg)
John is a 66-year-old who has worked with diesel vehicles most of his life. He has never been a smoker and exercises regularly.
His brother died of a heart attack at age 92. His wife has always been careful to ensure John is fed well with veggies and fruit, and lean meats especially since she had breast cancer. John’s blood pressure has always been normal.