CO2 kills humans. Does it also kill organisms? [closed]








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CO2 kills humans. 


Does it also kill organisms?
Does it also kill viruses?




Larger concentration of $\ce{CO2}$ directly affects only organisms with metabolism involving $\ce{CO2}$. 


Killing is indirect as humans and animals fall into unconsciousness and stop breathing.


$\ce{CO2}$ is used, in mixture with $\ce{N2}$, as protective gas for packed food. It may not necessary kill bacteria, rather stops their growth.


A virus does not have metabolism, so it is not affected this way.


It **may** be affected indirectly as $\ce{CO2}$ dissolved in water causes mildly acidic environment.


In summary, $\ce{CO2}$ cannot be considered as desinfectant.


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