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There are a number of threats to human existence, but as far as complete extinction a couple come to mind -- all out Nuclear War making the planed uninhabitable, or a massive asteroid collision. Conceivably a super-volcano could blanket the Earth blocking out the Sun, causing all complex life to die.
The event most likely to push us into a primitive existence is global warming which in turn will cause world hunger/starvation. Unless the atmosphere becomes to hot to support human life, some people will probably survive but their existence will be more like primitive man.
Another possibility is a plague or parasite that medicine cannot deal with. It seems unlikely it could annihilate all humans but might create a situation like the one mentioned above caused by global warming.
Though it seems unlikely we can exist that long, but eventually the Sun will explode and end all life in out solar system. If we haven't found a distant hospitable planet to move to it end human life.
Wiki User
∙ 8y ago
Wiki User
∙ 8y agoHumanity
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the threat communism spreading to turkey and Greece ----> NOVA NET ANSWER
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probably hunters and human murders
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Humans and human activities, particularly fishing are the biggest threats.
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The greatest threat to man's existence caused by human changes to the environment is?
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What is manbearpig?
The single biggest threat to our planet. Something out there which threatens our very existence and may be the end to the human race as we know it.Answer from the cha cha questionare-#- 242-242 text it and find some great answers to any of your questions...
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Habitation by humans and human activities like deforestation and converting nature into cropland.
What is the beavers biggest threat?
Beavers are listed as Least Concern by the IUCN. Not an endangered species.
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Jellyfish are eaten by squid. I believe that this is the biggest threat that they face.
How large was the biggest earthquake?
Are you referring to Earthquakes during or before our human race cultivated the planet because to answer this question the biggest Earthquakes happened before our existence. During our existence I'm sure you can find the largest Earthquakes in Asia.
