Individuals crossing exclusively within the same population produce more progeny than those crossing in both directions and thereby use up some of their gametes for the production of inviable hybrids.
A tax advantage is also available to holders of most depletive assets—those which are used up, or depleted, over a period of time—like oil, natural gas, uranium, or coal.
The library's using up those shelves at about 8km per year, so they've just started construction on their next storage building, which should be good for a few decades.
They wear the same t-shirts and and sweatshirts all the time because they don't want to spend you know use up one of their decisions thinking all what am I gonna wear today?
Meteorologists announced this year that if the 21 original names get used up, a supplemental list with more names will be used instead of the Greek letters.
However, if you eat three meals a day, with snacks in between, your body does not have time to use up all of the glycogen in the liver. So, the learning and memory chemicals are not produced.
Even when you're flagging, this is so easy to put together, and - bonus - you get to use up all those nagging little leftovers knocking around in your fridge.