and they are increasing ,not getting less ,in the dinosaurs days ,there were no desserts.
collectively this planet is drying up because of bad farming practices like,over grazing and fertilizers,
as far as the food production is concerned, Global warming or some of its effects are serious,rising seas result in landloss
each degree rise in temperature means 10%crop loss
more landloss because of desertification every year,we have less areble land to produce food ,for an extra 70 million people