original_query: What is the purpose of detailing the effects of radioactivity and the principles of nuclear power in chapters two and three?
query: What is the purpose of detailing the effects of radioactivity and the principles of nuclear power in chapters two and three of the Flowers Report?
answer: Chapters two and three's detailed explanations of radioactivity and nuclear power principles are to provide a better understanding of the environmental problems associated with nuclear power, which are discussed in later chapters.