What do you know today that you didn't know yesterday?

[GrandizerII]

To be arable, there needs to also be adequate supply of water. IOW, not so dry as to not be able to promote food growth.

Shouldn't air become more humid because of higher temperatures?

No ... The effects of climate change include a drier climate.

From the link I posted earlier:

The rate of the changing climate is leading to drier conditions in the boreal forest, which leads to a whole host of subsequent issues.

Also this link:
https://phys.org/news/2018-10-warmer-cli...pacts.html

ETA:

I should rather say that it's not necessarily going to be more rain. Depends on various factors at hand and where in the world, the effect could be something like increased droughts or heavier rainfalls.