Until the Columbian Exchange,humans did not noticeably alter the natural environment.

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Humans have been altering their environment in various ways for thousands of years, through activities such as agriculture, hunting, deforestation, and urbanization. The Columbian Exchange, which began in the late 15th century, did introduce new species and transformed ecosystems on a larger scale, but it was not the first instance of human impact on the environment.

Until the Columbian Exchange,humans Did Not Noticeably Alter the Natural