In our days, fewer and fewer people care about our world. Everywhere we see environmental pollution on our geocaching trips. The beauty of nature is often, even in lost places, disturbed by empty cans or plastic bottles.
This Cache and his sense may not save the world, but "many a little makes a mickle".
P.S. I know that the cachecontainer is also plastic, but I think that we all understand what I want to tell :)