However, longer term we must still move away from burning fossil fuels even if we make them completely carbon neutral, because while its a slow effect they are

However, longer term we must still move away from burning fossil fuels even if we make them completely carbon neutral, because while its a slow effect they are not oxygen neutral... If synthetic hydrocarbons get their hydrogen from water (electrolysis or high temperature thermochemical cycles), their life cycle is oxygen-neutral as well. The extraction of hydrogen from water simultaneously produces a matching quantity of oxygen.