Comments by "robheusd" (@robheusd) on "Why is Africa building a Great Green Wall? BBC News" video.

  1. 11 million trees for that area? That is a coverage of less then 100 trees per km2. Realistically, you would need 8000 x 15 x 100 x 100 trees = 1,2 billion trees covering 8000 km by 15 km and 10.000 trees per km2 (distance between trees 10 m). If Europe pays Africa 10 euro per planted tree, it would cost 12 billion euro, spread out over 4 years, so that is just 3 billion a year, paid by 28 countries. And a significant reduce in migrants and less CO2 emissions, increased value of land and increased yields of crops. It can pay for itself!
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  2. The area to plant trees is something like 6000 km x 20 km = 120.000 sq. km. Lets say a group of planters can plant 100 trees a day for 250 days per year. We plant at 100 locations and at each location we have 100 groups of planters. Density of trees is 100 trees per hectare (distance between trees = 10 m). The project could then be finished in just 4 years. The planting of trees can be fully mechanized, so if we really wanted to, we could do this much faster. Benefits of this project: Carbon credits. Increased value of the land. Crops produced on the land. Less risk of famine and less refugees to Europe. I would say: lets do this on a bigger scale.
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  3. It's a shame Europen countries pay african countries to take back african refugees (which then end up in a Libyan slave camp or are dropped in the middle of the desert), but does not contribute much to projects like this that can solve the problem of food shortages due to desertification. Als check China, it has been doing this on a large scale for decades, and China is the only country where the deserts shrink instead of grow.
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