Answer:
What negative impact did it have? Provided flood control, hydroelectric power, conservation, recreational facilities; coal burning caused environmental pollution.
Answer:
Pope Urban II called for all Christians to unite and fight the Muslims to regain control of the Holy lands. After four Crusades, the Muslims won control of the Holy Lands. However, the crusades resulted in increased trade in Europe and the development of towns.
Explanation:
Answer: The person who led the Marxist revolutionaries in Russia was Vladimir Lenin.
Explanation: I learned about this a while ago.