GPS Longevity

In article ,
Stella Starr wrote:

Longworth wrote:

I always have to try hard to stay awake flying over flat
agricultural land like Iowa in all seasons.

Me too. It's like slowly driving across a MAP of Iowa. A couple years
ago scientific measurements confirmed that the sky there is also hazier
than it used to be, largely because of transpiration from the crops and
dust from cultivation. Anyone who lives there can tell you Iowa's long
been known as the most biologically-altered state in the nation.

I thought the haze was related to Mt St Helens...

--
Bob Noel
(goodness, please trim replies!!!)