Maybe you were the first person to have a machine to detect it......but I didn't know there were any available in 2004. I didn't even notice any pollution!!
You obviously left when the numbers were very low, you could see the numbers going up and opted to save yourselves from it
But I don't blame you for leaving..save your life, that's why I left.
I have bronchitis as it is , and am sure it would be further agreived in CM