Columbia subject headings:
Harvard subject headings:
Desertification--Control--Africa.
Desertification--Control--Sahel.
Environmental policy--Africa
Environmental policy--Sahel.
Great Green Wall (Project)
Reforestation--Sahel.
Rural development--Environmental aspects--Sahel.
Soil conservation projects--Sahel.
Soil management--Sahel.
Princeton subject headings:
Desertification--Control--Sahel.
Environmental policy--Sahel.
Great Green Wall (Project)
Reforestation--Sahel.
Rural development--Environmental aspects--Sahel.
Soil conservation projects--Sahel.
Soil management--Sahel.