which of the following could be a part of effective plan to decrease the environmental impacts of using resources.

All of the above and all of the below

Brazzaville and kinshasha, luanda,librevilleand and monrovia.

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!