<<Disclaimer: Verify this information before applying it to your situation.>>
 
I was wondering ....  I just recently rode my bicycle through a cloud of
wheat dust (they are harvesting wheat in Indiana now) - I didn't have any
reaction at the time, but should I be more careful around those fields of
wheat? I tried to hold my breath, but when you are pumping the big gears, it
is a little bit impossible.
 
Thanks