Fluorescence can be used to detect perturbations caused by handling and transport of green crops and even to detect damage in fruits that have chlorophyll in their peels.
Who has the money to buy 200 000 to 300 000 tons of green crop in April at 120 to 130 leva a ton, without leaving any evidence in the banking system that money has been borrowed?
The view was pretty good, although much of the valley is either just endless brown or endless squares of green crops.