I have some crazy friends back in Illinois......
A few years back, not only did I use used tires to help start fires to burn brush (Late 80's) across the road a guy had so much black smoke from burining tires from his burn pile, the airport that was just a couple miles away had to divert air traffic for a while. (true story)
Prior to that, in the 70's my grandparents had a salvage yard, and we would burn automotive wire so we could recycle the copper....since then, they decided that the ash from such fire is hazardous and has to be stored in drums.

We always had the cleanest fence rows....and never any weeds growing up in the cracks in the cement...used oil was great weed killer.
A garbage truck driver used to stop by our body shop when I was in high school to take 5 gallon cans of our used paint thinner....it killed the "smell" in the back of the truck...
Of course all of this is fictional and I will deny if the EPA cops show up.

What is the worst thing you have ever done to the enviroment???