id	keyword
m-591	� �
m-591	desertification
m-591	− �
m-591	climate
m-591	volume
m-591	issue
m-591	mathematics
m-591	september
m-591	mathematics volume
m-591	international
m-591	journal
m-591	land
m-591	change
m-591	ijo
m-591	https://www.ijojournals.com/index.php/m/index
m-591	africa