theswordsman said:In a recent article at Astana Fans, it said that his problems coincide with the season when the European poplars release the fluff.
Fair enough, but the operative phrase is "coincide with", not the same as causation. The fluff, being obvious to everyone, masks the actual agent, which is in at least a part of the world an unobtrusive grass; I get the impression that this is a relatively recent discovery (<20years). Nature is sneaky this way!
Apologies to anyone in the forum who considers this off-topic, I just wanted to ensure that a performance fact is not in error.