If your trip ended where it started, you just wasted energy.
Or more precisly, if your trip is a closed path, you wasted exergy.
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If you're just driving in a loop, yes. If you walk or cycle, you get some training out of it. And if you pick something up along the way, whether it's groceries or a better mood, it's not a complete waste either. In fact most trips start and end at home, yet many are more than useful; they are pretty much essential.
Luke73 · 26-30, M
@NerdyPotato That's true. I've never said anything about usefulness though.