Another Shot At It?

Back in the bad old days, shot gun pellets were made of lead. It was found (surprise, surprise) that these pellets discharged into the environment were toxic to all sorts of organisms (including birds). Eventually, the lead pellets were banned and replaced by hard plastic. A Spanish company, BioAmmo, then became concerned that the plastic pellets were just another form of pollution (https://www.theguardian.com/environment/2021/jan/25/green-shoots-spanish-firm-tackles-plastic-waste-from-shotgun-cartridges). They developed (and now market, in around 20 countries), shot gun cartridges that are 100% plastic free, biodegradable and biocompostable (so no metal caps either?). I suppose that this is an environmental improvement but they could always stop shooting birds?