Clay pigeons used to be made with petroleum byproducts, but generally aren't any more. As well, there are targets available that break down in the rain, and don't pose a toxic risk to wildlife. These targets cost a little more, and are a little more prone to breaking in the thrower, but still cheap. I usually shoot clays in open farm fields (with permission, of course). My guests and I always police our casings, and pick up our re-usable targets. I avoid trap clubs because the fees and membership costs put it out of my budget, and I live close to plenty of people with places for me to shoot. Those of you who seem to believe trap shooting to be an ecological crime should consider that almost any outdoor activity can be a source of litter and pollution if the participants are careless. Likewise, most outdoor activities can be done in an ecologically sound manner if we are mindful, careful, and willing to accept the cost of non-toxic, biodegradable materials. As for concerns about impact-area; shotguns are conventionally used in a manner that precludes the shooter from knowing exactly where the shot-charge will land. This is acceptable because most birdshot does not retain enough energy at even moderate ranges to do meaningful damage.
