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Not getting how that's possible at all. An ice age would be far more devastating to the human race than a warming period. Crop yields are up: 1) https://www.nass.usda.gov/Charts_and_Maps/Field_Crops/cornyl... 2) https://www.nass.usda.gov/Charts_and_Maps/Field_Crops/riceyl... Ok, so food looks safe and secure. Um, lets see, what are the other basic needs? Shelter? Water? We've had the rainiest year in 125 years: https…
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.
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.