[Blueflag]

Methane is odorless and nontoxic in and of itself.

In high enough concentrations it can be suffocating. But it’s lighter than air and dissipates rapidly.

Sunlight also breaks it down rapidly in the atmosphere. It doesn’t persist like CO2 does.

[PeterPrinciple]

It doesn’t persist like CO2 does.

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co2 doesn’t last long either, plants eat it................