The environmental protection agency is responsible for enforcing the clean air act to

The Environmental Protection Agency enforces the Clean Air Act in states of the US by monitoring and assessing the situation, as well as educating people about the importance of preserving ecosystems. They issue fines and sanctions to companies that don't abide by the act since they are a federal agency and have the power to do that.

It developed as a reaction to the impact of european colonialism in africa on peoples of african descent. in the  mid-20th century, activists in africa adopted pan-africanism as a rallying cry for independence from colonial rule. some african pan-africanists sought to unite the continent as one independenthope it was useful