KEY TAKEAWAYS •
The Holocene extinction is the reduction in biodiversity and increase in extinctions because of human impact on the earth.
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Islands have a greater chance of losing species when mankind inhabits them and introduces invasive species.
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There are many possibilities for human evolution. Most scientists agree that there have been physiological changes in humans since the dawn of mankind.
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Human extinction is probable but the exact timing for this is unclear. It is unlikely to have total annihilation of the human race because of most manmade catastrophes.
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Eventually, CO2 levels will rise, the oceans will evaporate, and the earth will be sterilized by the enlarging sun.
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There are numerous effects on the environment because of global warming, including rising temperatures, decreases in snowpack and glacier sizes, and rising sea levels.
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Humans will be greatly impacted by global warming, which will affect human health, the economy, and food security.
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