It’s humbling to realize that, despite my age, there are still some things I’ve never heard of. Or, is it because of my age…?
I suppose I could be forgiven for being unaware –I almost said uninterested– in things that trend nowadays, the inference being that, lacking in statistical significance, those things which appeal to a segment of the population to which I am not credentialed have been assigned a new category. But what about issues that have been bubbling about for almost a century, albeit far enough away that I am seldom directly affected? And yet, distance excuses nothing. I hear of hurricanes, and distant floods. I am all too aware of the melting of Greenland’s glaciers, not to mention similar changes in Antarctica, so why would Africa be any different? News of terrorism, political coups, and natural disasters there abound in everyday news, so how could anything as filled with potential as a decades long project to arrest the steady creep of desertification into sub-Saharan Africa have crept past me?
The Sahara is the second largest desert in the world, after Antarctica and throughout the history of the region, it has undergone millennial climatic oscillations. From about 11,000 to 5,000 years ago (during the early Holocene epoch), trees, lakes, grasslands once covered the arid Sahara. ‘The Green Sahara was the most recent of a succession of wet phases paced by orbital precession that extends back to the late Miocene. When the precessional cycle approaches perihelion during boreal summer, the increase in insolation drives a strong land-sea temperature gradient over North Africa that strengthens the African monsoon, bringing rainfall deep into the Sahara,’ according to a paper authored by geologist Jessica Tierney of the University of Arizona and published in Science Advances http://advances.sciencemag.org/content/3/1/e1601503.full
The last few millennia, however, have been dominated by aridity and a fear that the desert is slowly creeping southward. And while, apart from the Nile arriving from much further south, little was felt to be able to reclaim the desert itself. So, the idea of preventing further encroachment along its southern borders –the Sahel- was proposed.
As the Smithsonian Magazine reports, ‘The Sahel spans 3,360 miles from the Atlantic Ocean to the Indian Ocean, a belt stretching across the southern edge of the Sahara. Rainfall is low, from four to 24 inches per year, and droughts are frequent. Climate change means greater extremes of rainfall as the population skyrockets in the region, one of the poorest in the world. Food security is an urgent concern. By 2050, the population could leap to 340 million, up from 30 million in 1950 and 135 million today.
‘In 1952 the English forester Richard St. Barbe Baker suggested that a ”green front” in the form of a 50km wide barrier of trees be erected to contain the spreading desert. Droughts in the Horn of Africa and the Sahel from the 1970s onwards gave wings to the idea, and in 2007 the African Union approved the Great Green Wall Initiative.’ https://qz.com/1014396/the-plan-for-a-great-green-wall-to-beat-back-the-sahara-needs-a-rethink/
The idea was that a green ‘wall’ from from Senegal in the west to Djibouti in the east would not only halt further desertification, but the people in this area would benefit with jobs, increased arability of the land, and maybe even tourists.
As it was originally conceived, however, it seems retrospectively naïve. Perhaps the Smithsonian magazine summarizes it best: https://www.smithsonianmag.com/science-nature/great-green-wall-stop-desertification-not-so-much-180960171/ ‘”If all the trees that had been planted in the Sahara since the early 1980s had survived, it would look like Amazonia,” adds Chris Reij, a sustainable land management specialist and senior fellow at the World Resources Institute who has been working in Africa since 1978. “Essentially 80 percent or more of planted trees have died.” Reij, Garrity and other scientists working on the ground knew […] that farmers in Niger and Burkina Faso, in particular, had discovered a cheap, effective way to regreen the Sahel. They did so by using simple water harvesting techniques and protecting trees that emerged naturally on their farms. Slowly, the idea of a Great Green Wall has changed into a program centered around indigenous land use techniques, not planting a forest on the edge of a desert.
‘The African Union and the United Nations Food and Agricultural Organization now refer to it as “Africa’s flagship initiative to combat land degradation, desertification and drought.” Incredibly, the Great Green Wall—or some form of it—appears to be working. “We moved the vision of the Great Green Wall from one that was impractical to one that was practical,” says Mohamed Bakaar, the lead environmental specialist for Global Environmental Facility the organization that examines the environmental benefit of World Bank projects. “It is not necessarily a physical wall, but rather a mosaic of land use practices that ultimately will meet the expectations of a wall. It has been transformed into a metaphorical thing.”’
I like metaphors, especially wall metaphors… Edge metaphors in particular. There is something intriguing about what happens at boundaries when things alien to each other, let alone inimical, meet. There is usually a testing of one another, a probing for similarities, weaknesses, and then often as not, attempts at breach. And if both sides absorb the assaults, the wall then becomes a compromise –not maintaining a separate identity, but melding, as it were, into a new entity. A new creature.
So, although it may be true that what lies far away on either side stays true to itself, the wall is a relationship -a neither-nor that exists as a bridge to each. Walls, are like skin: it separates us from the world beyond, but it also joins us to it. The Green ‘Wall’, in a way, highlights this. Rather than artificially planting trees, the farmers allowed the tree roots still in the ground to regenerate –these, presumably, were already adapted to the local conditions. ‘Tony Rinaudo, an Australian with Serving in Mission, a religious nonprofit, working with local farmers, had helped the farmers identify useful species of trees in the stumps in their fields, protect them, and then prune them to promote growth. Farmers grew other crops around the trees.’
For example, ‘One tree, Faidherbia albida, goes dormant during the wet season when most trees grow. When the rains begin, the trees defoliate, dropping leaves that fertilize the soil. Because they have dropped their leaves, the trees do not shade crops during the growing season. Their value had long been recognized by farmers […] but they were never encouraged to use them.’
So, far from being a wall, the Sahel is more of a chain, with different parts linked together, however tentatively. However unlikely.
You have been told that, even like a chain, you are as weak as your weakest link.
This is but half the truth.
You are also as strong as your strongest link.
To measure you by your smallest deed is to reckon the power of the ocean
by the frailty of its foam. Kahlil Gibran…
Metaphors are powerful things.
http://www.atlasobscura.com/places/the-great-green-wall-of-africa
