Since Southern blacks were not allowed to fight in the Civil War, they were able to contribute to the war effort by joining the army despite the rules against it. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
Even before the invention of the automobile, petroleum was in high demand because it could be turned into kerosene. Also, it is used as oil for lights, lubricate machines, be made into medicines and use for tar on roads and roofs. Hope this answers the question.
They want to show people of the younger gen about nature, trees, animals and etc in nature.
The renaissance gave way to enlightenment and rebirth. This period of time allowed the modern era to break off from its past medieval era. The renaissance allowed Europe to rise up and be what it is today.
They can be harmful because these communications can be between large money donors and the candidates, which can lead to a conflict of interest and affect the candidates message.