Microbes Participate in Which Step of Wastewater Treatment

question 31

Multiple Choice

Microbes participate in which step of wastewater treatment?

• A) preliminary
• B) primary
• C) secondary
• D) tertiary
• E) every step

---

Definitions:

Communist Regimes

Governments based on communist principles, typically characterized by the absence of private ownership and the state control of resources and industry.

Walter Lippmann

An influential American journalist and commentator known for his works on media and public opinion.

Containment Doctrine

A foreign policy strategy adopted by the United States during the Cold War aiming to prevent the spread of communism by providing political, military, or economic assistance to threatened nations.

Marshall Plan

A U.S.-initiated program aimed at the economic recovery of war-torn Europe post World War II, through significant financial aid and rebuilding efforts.