Does it exist? I tried google and found nothing. Got thinking about this just now while posting in another thread. We landscapers leave tons of little pieces of petroleum based trimmer line spewed all over our customers lawns. Not at all environmentally friendly. Perhaps a big opportunity for a new product that will revolutionize and "green up" lawn care. Maybe our dear President, bless his heart, will even outlaw the oil based stuff and make "green string" mandatory. Hey, he can take the salt out of our food, so why not this? So what if it works like crap!!