Palo Verde has been evaporating 100% of the city of Phoenix's wastewater since the late 1980's: https://en.wikipedia.org/wiki/Palo_Verde_Nuclear_Generating_Sta

Palo Verde has been evaporating 100% of the city of Phoenix's wastewater since the late 1980's: https://en.wikipedia.org/wiki/Palo_Verde_Nuclear_Generating_Station https://en.wikipedia.org/wiki/Palo_Verde_Nuclear_Generating_... If driving insane amounts of humidity into desert air has any effect on desert ecosystems, we'd know by now. Mining groundwater is a big concern. Putting it back into the atmosphere afterward, not so much.