Most of the sweet gum pods have dropped. I spent a while blowing a ton of 'em off the driveway, and went as far as the extension cord allowed, to blow them out of the grass and into the natural areas. I do the yard, section by section, so more will be cleaned as weather allows.
For those not familiar, sweet gum trees are a real PITA for 2 reasons. First is the wood is soft yet very heavy, so any storm is likely to rip chunks off the tree. I've had the top half of a 60' tree come down right by the house. No damage done, but it's no fun cleaning up the mess.
Reason 2:
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The seed pods are nature's caltrops. If you step on one with bare feet, you'll understand. Plus they are the one thing in nature that takes longer to decompose than a cigarette butt, roughly 65 million years. So if not removed ... well, they'll build up year after year.
Japan is researching growing giant seed pods. They want to line the shore with the pods so Godzilla cannot come ashore. His atomic breath won't burn them and even his feet are not THAT tough if he steps on them.