The INF (International Naturist Federation) defined naturism as ‘living in harmony with nature, expressed through personal and social nudity, and characterised by respect of people with different opinions and for the environment’.
That means we should be cleaning up after us and, if we all do it, we leave a beach in as pristine a condition as we hopefully found it. And if we found it in slightly less than pristine condition (although my experience is that naturists are pretty good at taking their beach detritus with them), then picking up and binning a couple of bits of litter we didn’t generate means we’re doing our own little bit to improve our environment.
In SL, interestingly, genuine naturist sim builders have either consciously or subconsciously adopted this approach. I prefer to think of it as conscious thinking to the issue, a subliminal message that each of us take responsibility to our environment.