American presidents have a variety of backgrounds. Who was the only political scientist to become president?

The seminal Clean Air Act of 1970 did which of the following?

a. Charged the Environmental Protection Agency (EPA) with setting air quality standards that would apply nationwide b. Created a national pollution tax to be assessed against all industrial polluters c. Established a large contingent of federal pollution monitors, who were charged with monitoring and enforcing compliance with the law's provisions d. All of the above

A common barrier to successfully reintegrating prisoners back into society after their release is

A) ?their reluctance to leave prison. B) ?difficulty finding employment. C) ?legal bans on ex-convicts obtaining a higher education. D) ?constant police harassment.