Fortunately, this planet has abundant land and sea life that will absorb and fix that carbon dioxide for you, liberating highly reactive oxygen in the process.

Fortunately, this planet has abundant land and sea life that will absorb and fix that carbon dioxide for you, liberating highly reactive oxygen in the process. No problem - the amount of carbon used is proportional to the amount of carbon available. All available evidence shows that CO2 lags global temperature rises, rather than leading it. Science IS real, and it says carbon is NOT a pollutant. You should have no guilt over this (although efficiency is always to be aimed for). And carbon is probably the least objectionable byproduct of burning the bunker oil that fuels ships - you can't make anything that heavy burn cleanly without insane combustion temperatures.