Kentucky sank 1,700 used Christmas trees in one 92-acre lake to give fish new places to hide
Residents donated about 5,000 trees last winter; the state anchors them underwater in clusters and posts the GPS points so anglers can find them.
Recycling
A 1990 Wisconsin test road over shredded tires drained like gravel, and states still use the idea
University of Wisconsin engineers tested tire chips under a landfill road used by garbage trucks. Today California uses tire-derived aggregate under rail lines and in landslide repairs.
The forgotten experiment that paved American streets with crushed glass
Since the early 1970s, engineers have tested "glasphalt", asphalt made partly from waste glass. It works, within limits, and here is why it never became the norm.