I lived and worked on Guam for two years and found nothing "pristine."  Guam is littered with trash.  It has a bulk collection system that is free for the first two pick-ups each year and $25 for each additional pick up.  Instead of paying for additional pickup, the standard practice is to dump bulk items in the vegetation along remote stretches of roadways.  The back road from Mangilao to Andersen Air Force, Guam Route 15, is a favorite dumping ground.  The items are not noticeable during the rainy season when the vegetation is lush and green, but two or three weeks into the ray season the leaves turn brown and fall from the vegetation exposing one very long bulk item dump along both sides of the highway.

Labels: moderation: safe