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Are all threats to biodiversity caused by humans?

Answer 1

No. But the majority (probably 90% +) is caused by human being

As an associate professor of environmental engineering, I believe that humans are responsible for at least 90% of the extinction of species. While natural disasters like hurricanes are caused by human activity, such as global climate change brought on by rising CO2 and other greenhouse gases, biodiversity loss (or species extinction) occurs due to both human-made and natural factors.

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Answer 2

Jose Arroyo

No, not all threats to biodiversity are caused by humans. Natural factors such as climate change, geological events, and natural disasters also contribute to biodiversity loss.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.