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Old 08-28-2019, 03:29 AM
eburacum45 is offline
Join Date: Feb 2003
Location: Old York
Posts: 2,884
Just to reinforce my earlier point, the total mass of the biosphere is about 4 exagrams (4000 petagrams, 4 million teragrams, 4 trillion tonnes etc). This includes soil bacteria and so on.
The total mass of the oxygen in the air is 1200 exagrams, 1.2 quadrillion tonnes. Even if the biosphere were made of pure carbon, we would only remove about a third of a percent of the oxygen in the air by burning it all.

Of course burning all that carbon would raise the level of greenhouse gases beyond the danger level, but we wouldn't care, since we would be part of the carbonised biosphere anyway.