Why do people use tractor tires as yard decorations?
Here are some ways I've seen them used:
Flower garden planters. What makes anyone think that this somehow makes your flowers more beautiful?
Driveway "lions". You know, like 2 tires standing up on either side of the driveway. It's like a white trash version of stone pillars.
Playground equipment. When I was in elementary school, we had about 4 different sizes of them painted different colors stuck upright in the ground. We hid inside them, climbed up using the treads as handles, and jumped from one to the other. It sucked when you jumped on the one that was not very sturdy because you'd leap with all your might only to find yourself landing on not so solid ground. The wimpy tire would lean over or buckle under you and you'd think, "Oh crap, I forgot this was the sucky one."
I guess maybe using tractor tires as yard decorations could be considered "green" since it's better than the alternative of illegally dumping them on someone else's property. But still, being "green" is a poor excuse for dorkiness that has no cure, which is what you have if you have tractor tires as yard decorations.