The triple bottom line (TBL) is a framework that measures the social, environmental, and economic performance of an organization or a project. Environmental equity and justice are concepts that address the fair distribution of environmental benefits and burdens among different groups of people. How does the TBL relate to environmental equity and justice in the context of South Africa and the African continent? What are the main challenges and opportunities for applying the TBL approach in this region? Provide examples and evidence to support your answer.