Comment by rtpg
43 minutes ago
I guess it has to be said: it is not guaranteed that the water rains in the "right" spots for it to be useful freshwater again anymore. Dumb example: maybe the wind currents mean that the water simply comes back down downstream.
One shouldn't assume that evaporated water comes back into the system in the place you want it to. Water management orgs try to reduce loss from evaporation for a reason!
OK sure but this is like defense in depth. It's a negligible amount of water, most of it doesn't evaporate, and most of what does rains somewhere it's useful anyway. The actual damage here is microscopic.