how to get a leaf pile in Sims 4?

Getting them is easy. Getting rid of them? Not so much. On your own lot, you simply throw them away, but they stay spawned all over the world, emitting toxic green fumes, making Sims filthy, regardless of the season. I spend so much time sending my active Sims around to burn all the leaf piles that I can't get anything else done! They should disappear during winter and not respawn until the following autumn! Another stupid oversight by the "brain trust" at EAxis!