How did the Dred Scott Case lead to the Civil War?

Recently, there has been pressure to loosen clean air standards. use economic arguments to support or oppose this proposed action.

Which of the following variables has the strongest influence on the variations found in american family life? a.race and ethnicity b.religious affiliation c.social class and culture d.education and occupation

According to the federal regulations, human subjects are living individuals about whom an investigator conducting research obtains information through interaction or intervention with the individual, and uses, studies, or analyzes the information; or: