Over the same period, certain other factorsâfor example, higher energy costsâhad a greater effect on food prices than did the use of ethanol as a motor fuel.â. Congressional Budget Office, The Impact of Ethanol Use on Food Prices and Greenhouse-Gas Emissions, April 2009.
Thousands of innocent Jews, who had also suffered from the plague, were slaughtered in dozens of European communities. Social and Economic Effects of the Black Death. Some social changes caused by the Black Death were positive. Before the plague, peasant serfs were confined to their lord's estate and received little or no payment for their work. Overpopulation and shortage of resources led to malnutrition and extreme poverty for many peasants.
The Effects of the Great Migration. The significant increase in the African American population of the North was a major effect of the Great Migration. But once black Southerners arrived, they found reality didn't often parallel their optimistic expectations.