I've started to see more examples of people reusing materials for art projects. This is especially evident trash from our childhood or refuse with a deep cultural significance, or both. For instance, I love this home decoration made out of discarded computer keys. Here is an article with 7 more reuse artwork projects.
New houses tend to be made out of less sturdy materials than the houses still standing from 50+ years ago. Even then some architects were reusing materials from large building projects in their houses. I read a book about building houses that advocated using old railroad ties to support the roof, as well as salvaged doors, windows, floors, etc.
I enjoy books, and I'm so glad that there is such a large market for used and donated book. I'm sad, though, that there isn't more strictness on what gets written down (somehow) because libraries are often overflowing with texts, which get indiscriminately destroyed when space requires.
If you haven't heard of it, check out Freecycle. It is an online service that allows you to post your unwanted junk, and others will often say they want it, and come pick it up from you. It's taking advantage of the idea that one person's trash is another's treasure in a unique, technologically sophisticated way. I wonder when small businesses are going to get in on that, and eventually there could be an associated trade in old business furniture or other un-marked office equipment.
If you've seen 5 episodes of Dragonballz, you've seen 500, am I right?