The atmosphere then becomes a kind of carbon reservoir and we tune the CO2 content to match our needs. Either we want to control temperatures, or we want liquid

The atmosphere then becomes a kind of carbon reservoir and we tune the CO2 content to match our needs. Either we want to control temperatures, or we want liquid carbon fuels which are, to date, the best aerial platform fuel form. For maximum Carbon availability and use/recycling, we would want to put all the carbon locked in oil/underground into the atmosphere where it is far more available to use. This allows the Earth system to maximize its metabolic rate. Maybe we should see the burning of fossil fuels as the unlocking of Earth's buried carbon repositories so they can be more easily used. Plants concur.