Conservation and Biodiversity Question
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Which of the following statements is true?
- humans may have been causing extinctions millions of years ago, but our impact has recently increased
- humans are responsible for many of the mass extinctions in the geologic record
- humans only began causing extinctions in the past 150 years
- humans have never had significant impact on species extinctions until the past four decades
- humans may have been causing extinctions thousands of years ago, but our impact has recently increased