[mbowcutt]

While it's true that there's an abundance of water, the issue is that there's limited drinking water.

You can't survive on drinking ocean water. There's currently no energy-efficient process to remove salt and other impurities from unpotable water. That's a real issue.

Increased rainfall could be good, but could cause flooding and doesn't do much benefit when it's acidic.

[chrisco255]

Well we really don't have very good predictions for how much rainfall will occur over the next century, but we have no reason to believe that droughts will become standard. Especially since we just experienced record rainfall in the midst of the 4th hottest year in modern records.

There are ways to remove salt from ocean water. It's just almost always more expensive than extracting from the widely available fresh water sources on the planet.

As long as the water cycle is going, we'll still have fresh water.

Rainfall is good, but flooding is a localized issue. It's not a global concern. CO2 doesn't cause acid rain.