The impact of desertification and dust storms on agriculture

[Millik]

Hello all,

Could desertification exacerbate dust storms so much, and thereby destroy agriculture on earth? (due to the drop in temperature and sunlight)
Also, under what kind of circumstances would desertification spread so much so that all plants on Earth would become extinct?

If such a thing were about to happen, what would be the best way for humans to protect the few remaining plant specimen?

 

[Bystander]

See
https://www.physicsforums.com/threads/is-desert-ever-a-good-thing.885940/