tbf the middle step in the process between asphyxiation and dying is passing out, and that seems like the most relevant part for someone who lost consciousness and then drowned in a septic tank.
I thought that CO is different because it actively binds to the red blood cells so that O2 can no longer be carried around. Other types of gasses just get stuck in your lungs and take up space so that less O2 is available to be sucked into your blood.
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That's carbon monoxide, not methane. Also, carbon monoxide poisoning isn't "passing out", it's asphyxiation and dying.
tbf the middle step in the process between asphyxiation and dying is passing out, and that seems like the most relevant part for someone who lost consciousness and then drowned in a septic tank.
I’m sorry to hear that you lost consciousness and drowned in a septic tank.
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I thought that CO is different because it actively binds to the red blood cells so that O2 can no longer be carried around. Other types of gasses just get stuck in your lungs and take up space so that less O2 is available to be sucked into your blood.
The danger of methane is that it is a more potent greenhouse gas than CO2.
You might be thinking of hydrogen sulphide!