I always bring this up as im a forester and we use quite a bit of deisel legally but in a way where a large amount ends up on the ground.
First you all have seen the prescribed burns im sure and heard about them. Well the torch fuel we use is 60/40 deisel/gas mix (when i worked on the army base it was also any old fuel mix/gas or flamable liquid that would otherwise had to go to the haswaste contractor). When we burned an area you never get 100% burn, meaning that just cause you have a lit torch, if the wind blows or something you are squirting fuel out thats not ignited, and if in a wet area or hardwood leaves may not get burned over. You dont intentionaly do it but your also walking and slinging a torch with liquid fire on it. Your not always watching the tip to see what its doing but navigating the woods so that you dont trip or fall.
Second is in herbicide applications. There are Oil based herbicides, Garlon and all its incarnates to mention one. That it labled for mixture with deisel fuel. In these applications when foliar applied it will cut the waxy cuticle and allow penetration of the herbicide to work more effectivly, think saw palmetto or wax myrtle or bay berry, gal berry etc. OR it is used in a basal injection mix. Which is a highly concentrated mix of garlon and deisel, sprayed with a stream nozzel directly onto the bark of the tree desired to be killed. The deisel carries it into the cambium of the tree for it to work.
Like i said these are all legal uses but uses none the less that fuel gets applied to nature.
Another that i always bring up is the paint we use to mark with. One man can use several gallons of paint a day, sprayed all over the woods and ground. But dump that paint on the ground and sling it all over and its illegal. :confused2: I see the reason, but my point is that the end result is the same, there is still 2 gallons of piant in the woods. And not it does not all stick to the tree and go to the mill in the waste burn bark. Id say a good 60% or more is left in the woods in either overspray, or when the bark falls or is knocked off in the process of cutting skidding mechandising and loading the truck.