Commercial bottled water may cost more in terms of energy needed to produce it, and the money you pay for it, however:
If you're pouring yourself a glass of tapwater, how many of you run it for a few seconds until it runs colder? That's technically wasting water too. Also, if you fill up some bottles and stick them in the fridge, how much additional energy is required by the fridge to keep those bottles cool? By the same token though, the commercial bottled water also usually ends up in the fridge before you consume it.
I say this as someone who prefers to drink tapwater, mostly outof not really ever switching over to bottled water when it started to become more popular. Just saying that you can take all sorts of things into account in the equation over which costs more, or is more harmful to the environment, etc. I would guess that tap water comes out on top, but it probably isn't by as big a margin as some would say.
|