No actually I do not see answers to my questions so clearly as you and apparently others do.
No health impacts from this? So then you'd be willing to swallow it? Get it in your hair? Eyes? Lungs? Food? How about a gel capsule down the hatch? Did you see anything in either linked article that mentions this? I didn't. I see what is supposed to be a harmless acid and hydrogen mentioned as byproducts, nothing more. Hey is Graphene okay to swallow? Buckyballs? You might be surprised. You might not want to swallow any of this and you may also find that if it's produced in quantity that it will find it's way into our food chain or used as a weapon. I'm not against it, just not quite so quick to become excited. That you so quickly dismiss this line of thinking, along with others, is amusing.
Product of the reaction is an acid and hydrogen. With tap water? Sewer water? Distilled water? Are we going to be taking the equivalent of drinking water to use this? If it's potable water then it's a bit more valuable than something I'd drain a ditch to get. If on the other hand I can use ditch water and the result is this acid, hydrogen, and the waste from the water then we might kill two birds with one stone - hence my question concerning it and my concerns ref potable water. I didn't mention exhaust, I know what the byproduct of burned hydrogen was and thought that was obvious.
No water used to produce this? Another post mentions that it's much the same as a chip manufacturing process (is it?) - lots of water and other chemicals used in that. Some of those chemicals are nasty BTW. I see nothing in the article regarding usage of water for production either for or against so I'm interested in why you dismissed this so quickly. Can you cite anything regarding producing this? Do note that it says "significant energy and resources" in the article...
The article states that hydrogen and acid are created, it mentions nothing about the medium being completely consumed or chances of recovery recovery. Citation please.
Waste byproducts of creating these - also not answered and yet you find the question redundant? The process for creating these is simply stated as " significant energy and resources to produce" and nothing more is said. Where exactly did you find the answer concerning this? I'm betting they aren't simply grinding down beach sand and since the spherical shape appears to be important to the process that would seem to imply some sort of process such as vaporization. That you leap to the conclusion that this process produces NO waste is amazing. Again, cite your sources for the conclusion since you so readily dismiss the question. Hint: it ain't in the linked articles or in the minuscule announcement made in the further linked article.