Pierced or not Ron, I strongly suspect that they end up as landfill in Australia, unless you know something different. They can be pierced and they 'can' be recycled, but I doubt that actually happens anywhere here. I am happy to be corrected and I am not arguing for one fuel over another here, but merely to prick the PR puff about fuel canisters being recycled in Australia. I have 12 stoves, almost all in regular use and they traverse most of the bushwalking fuel 'spectrum', but I have yet to read that the regular recycling of gas canisters and cartridges is actually happening in Australia. Do you know more?
rucksack