Like was postulated above some biomass OK, some is not. I always look at it like it was the half mile of country lane in front of my property. If, on one of my walks, it's something I'm gonna object to being there, I won't throw it. How tough is it to keep it until the next trash bin.
Height of fire season right now, my property is at the bottom of 4 miles of twisty switchback two lane climb. I usually find 5 to 7 beer cans, and 20 or so cig butts every month in grass alongside my side of road. I used to joke that the local rednecks had a choice of what to chuck out the window (beer or cig) as they are gonna have to stop steering with their knees, and actually downshift to go up hill. Needless to say, we keep that section weed-whacked to within an inch of ground, and spray no grow all along fenceline.
Believe it or not, there is a caution attached to this product.
"NOT FOR USE WHILE VEHICLE IS IN MOTION"
That would be what I call 'Nature weeding out the stupid'