[botexpert]

It still produces less CO2. This will of course not be a fact if fire rate increases.

It's a feedback loop. The warmer it gets more CO2 gets produced, not just by humans but by nature. The melting of ice caps will produce about 100 years of human CO2 equivalent methane (CO2 yearly production of 2016, I believe).

Humans are the source of the problem. They can remove themselves from the equation but it requires a less convenient life for most.