What's more dangerous than a drone to air passengers?

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What is the single most dangerous element of air travel? Despite what certain groups might suggest, it is NOT the risk of colliding with a drone. In fact, the real danger may surprise you. And it seems that Mr Tim Robinson of NZALPA won't be debating the issues with me, perhaps for fear of being exposed as a fearmonger.
Links:
CAA safety report:
Canadian alleged drone collision report:
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