RhenMyster

But about this virga. Could virga happen anytime of the year, as long as "low-level air is very dry"? And if it could, besides winter season, what would cause low-level air to dry?

Oh, don't get me wrong. If bad things happen with result of controling the weather, that's fine, actually, for my story's purpose, that's inevitable to the plot.

If someone wanted to cause death to the majority of the world, they would just need to find a way to cut off rain from those parts of the world? Which, according to the theories on this forum, is possible?

But if there was something that kept the sky from saturating, it wouldn't rain, right?

Let me pose another question. Perhaps the evaporation is taking place, but the precipitation is never falling to the ground. Maybe the clouds just are cooling off enough for the rain to form and fall.

So if technology advanced greatly in the coming years, could water be made artificially? And if so, would it be the same, or would the make-up differ in some way?

So, only few parts of the world could be saved? That's interesting. Another additional question. If water is a combination of two hydrogen atoms and one oxygen atom, then couldn't water be formed artificially?

I'm writing a story and for it, I want to know if rain (or precipitation rather) is necessary for life. If rain is just the cycle (and forgive me for not knowing the true technical terms for this) is just evaporation of the ground water into clouds that cause precipitation back to the ground, then do we really rely on rain? I know crops dry up if it hasn't rained for a long period of time, but if say today was the last day for the rain due to pollution or something, would we be able to survive? Could we not irrigate? Or is it vital for it to rain? On a further note, what could cause the end of precipitation?