Where does all that fog suddenly come from? “In 50 years, the number of fog days has been halved”

Those who looked outside this morning have undoubtedly noticed it: it is very foggy. Today, the Geel Code also applies to fog. But why do we suddenly see this weather phenomenon popping up again in the fall? When do you have the best chance of fog? And what special weather phenomenon can you spot thanks to the fog? HLN science journalist Martijn Peters explains.

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