Just a few years ago, the Sahel region at the northern edge of Senegal was a “barren wasteland” where nothing had grown for 40 years. But the United Nations World Food Programme (WFP) and local villagers teamed up to regreen the area, bringing back agriculture, improving the economy of the people who live there, and preventing the climate migration that desertification ultimately leads to.
Digger plus a tank of petrol a day is absolutely feasible no matter where you are in the world. There is no “less developed” area that they don’t have this. Everywhere has cars, everywhere has petrol powered boats and generators.
The cost of a tank of fuel for a digger in this area exceeds the average national monthly salary of Senegal. And I imagine this area has way below the average salaries.