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 | This user believes that common sense trumps all other arguments. |  |
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Things that can wipe out humanity
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| Category I |
Category II | Explanation | Estimated Time |
| Nature Disasters |
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Space |
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| Human triggered |
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Global Warming |
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| Biological |
| Sperm Count Reduction |
| Human sperm count has dropped more than 50% during 1973 - 2018
This might inevitable terminate humanity
It happens in western countries |
2100: Western countries would have a big problem
Probably hard to end humanity, but definitely would cause our concerns |
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