No its not about the dunes its about The Netherlands being far above their emissions level
The government once pointed out areas all over the country to be part of the European Natura 2000 plan.
And now it seems the emmissions from mostly nitrous oxygen i think are far above the levels allowed.
So it means they have to close all the mega stalls near these areas all over the country to get back to the levels.
It caused a full construction stop near all these areas and Zandvoort is actually one of those areas.
Next to that comes the whole dune question that to protect those more.
That is more coming from people living there and sick of the track having so many track days and such.
Corporate events and such going on during the week driving your coworkers around in cars as teambuilding