[neverdem]

In fact you CANNOT die from CO2 poisoning because is it not a poison.

Check out respiratory acidosis.

In some situations, CO2 can kill you. Normally, it doesn't.

The 1986 Lake Nyos Gas Disaster in Cameroon, West Africa

[Sunnyflorida]

CO2 can kill you but so can water. Respiratory acidosis is an effect not a cause.
CO2 kills by suffocation.