Yes, I accept your correction. I accept that the Saharan desert may be greening primarily for other reasons. It seems to have been on a long term trend towards

Yes, I accept your correction. I accept that the Saharan desert may be greening primarily for other reasons. It seems to have been on a long term trend towards greening irrespective of the Industrial Revolution, and there are other human activities that are greening it. Although, your link does leave open the possibility that rising CO2 explains up to 22% of the greening in the Sahara.