Originally Posted by
snow_echo_NY
i've heard pollution can be an issue for those with asthma and heart problems, but i don't know and don't know anyone who has it and cycles.
It can take time before people show any sign that pollution have on them. For instance, chronic silicosis can occurs 10 or more years after exposure. That's a negative aspect i see from some studies. You can't just study people on a short period when studying pollution impacts on people.