Yeah, nothing bad ever happens when anhydrous ammonia leaks. What could possibly go wrong?
Same as gasoline. There is not perfect solution.
I’m not strictly an environmentalist and would be fine with using hydrocarbons, because we have at least 10,000 years of hydrocarbons at current usage.
However, assuming that carbon really is a problem in the long-term, it’s good to ask whether or not that there are solutions.
Well, this particular blog seems to think that the options are either anhydrous ammonia, hydrazine (!) and pure hydrogen peroxide.
If that particular mix is your entire range of choices, I guess ammonia might not be so bad.
But maybe they should keep looking for something a little less corrosive/poisonous/explosive? To be fair, if those are the criteria, hydrazine would be just about the perfect fuel!