Answer:
Africa's barrier to implement new policies to minimize humanity's effects on their environment has to do with economic reasons.
Step-by-step explanation:
Africa is highly stigmatized as a very poor continent (except from few countries) and that means that not only individuals have little money on their pockets, but also that the government has not enough money to sustain such expensive policies as this one. Besides, this type of policies need and highly depend on external economic help and support, which no government is willing to give to such a poor continent.