Answer:it depends
Explanation: sustainability of what?
A country? A company?
As long as we maintain anything economically and or socially
Plate tectonic is a scientific theory that says the Earth’s lithosphere is divided into several plates. The plates glide over the mantle. In early 20th century, this theoretical model builds on the concept of continental drift. It was first proposed by the scientist Alfred Wegener in 1912. After seafloor spreading was validated, the theory was accepted by the geoscientific community.
The African continent isn't suffering from the environmental challenge "reforestation", since most of the continent hasn't suffered deforestation.
Tectonic Plates would be the answer
