Flying south from Europe over the French Riviera one could see the white wakes of many motor boats buzzing aimlessly around at Nice. Half an hour later the beaches of Algeria were equally golden, but empty. Then for 3 hours, without a touch of green, the Sahara was lifeless. A few pathetic clouds after 2 hours were just empty promises.Finally a few circle spots of irrigated vegetation showed life.
Hours more before natural green showed by cultivated land alongside iron oxide red rivers. Then somewhere near the center of the continent the jungle grew denser and finally crowded out all traces of humanity. It appeared as empty of people, though richly green, as the middle of the tan colored Sahara.