Final answer:
The author's purpose for writing this text is to shed light on an important environmental moment in America's history.
Step-by-step explanation:
The author's purpose for writing this text is to shed light on an important environmental moment in America's history. By discussing John Muir's opposition to developing the land as a national park, the author highlights the significance of environmental preservation. This text serves as a means to educate readers about the importance of protecting natural spaces and the ongoing arguments about water usage in major cities.
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