Let's see if I understand this, we're motoring around in a diesel powered boat purely for entertainment, but as long as we don't pee over the rail we're environmentally conscious? :?
I can't speak for others who have chosen to use composting toilets, but per the above reality, in my case the Airhead has nothing to do with being more/less environment friendly than the alternative. Its advantage is that it is more BOATER friendly.
However, on balance, I'd say when it comes to biological waste, our boat is pretty much environmentally neutral. I figure we remove at least our own weight in fish from the water every year. Surely what they excrete 24/7/365 is a lot more than anything we may inadvertently leave behind over the course of a few weeks on the water.
But... for the record, we recycle everything that goes into the head :roll: