When something breaks down into somethings safe enough for your kids to eat...it's bio-degradable
When something breaks down over time through use or lack of use...it's degrading.
When your mom drops you off at an airsoft game...and waits for you to play...that's degrading as well...(and don't think that other people don't notice and snicker behind your back...and if you're mom's hot, they're not snickering....
)
Frack book learning...yay practical life skills!