Yes Social Responsibility can help Africa going green thanks to the commitment of some companies operating there. It is a kind of given back toward their externalities impacted by the activities of those companies.
ISO 26000 is still a valid standard. ISO 26000 is the international standard that provides guidance on social responsibility. It outlines principles and practices for organizations to integrate social responsibility into their operations. It was first published in 2010. Like all International Standards, it is regularly reviewed to make sure its content is still up-to-date. ISO 26000 was last reviewed in 2021. The existing edition was confirmed during that review, as you can see in the ISO website at www.iso.org/standard/42546.html