What were the environmental costs of the Gold Rush?

Rivers were dammed or became clogged with sediment, forests were logged to provide needed timber, and the land was torn up all in pursuit of gold.

Explanation:

he Gold Rush, positive for California in so many ways, had a devastating effect on the state's environment. Many of these problems were directly related to gold-mining technology. The process of hydraulic mining, which became popular in the 1850s, caused irreparable environmental destruction.

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