jack wrote:

Right. You can put almost any (relatively clear) water in a clear
plastic bottle, put the bottle in the sun for a few hours, and,
presto, sterilized water.
And the proof of that is that dogs don't get sick after drinking from
puddles!
I sure hope nobody follows that advice, cause we aren't dogs.

Right. A Dog's digestive system relies on a different mix of chemicals than
a human's. This different mix (I think it's fuming Nitric Acid), kills
almost everything. That which is still active, is barfed up and the dog
re-eats around the offending material.