So the plan is to only use excess renewable energy that otherwise wouldn't get produced and consumed? If not wouldn't you be a net carbon generator, as you wou

So the plan is to only use excess renewable energy that otherwise wouldn't get produced and consumed? If not wouldn't you be a net carbon generator, as you would be burning fossil fuels and releasing carbon in order to capture a lesser amount of carbon in your process? What steps are in place to prevent the process from displacing other renewable use? Take the fact that it is less than 100% efficient to store renewable energy as gasoline. Others might make more efficient use of this renewable energy by immediately using it to displace fossil fuels, with no or lower storage losses. Under this scenario Prometheus is again a net carbon generator. (edit: The same dilemma is faced by any other type of storage.) It strikes me that Prometheus will come into its own if it can guarantee that it doesn't displace more efficient users. This will happen when fossil fuel usage becomes negligible or we (as a society) come up with a sophisticated energy scheduling algorithm that can take account of efficiency. It comes back to that fact that whilst it is green to replace fossil with renewable energy, it's even greener if we can increase efficiency and avoid consuming that energy in the first place. Don't get me wrong, correctly used it's a great thing you are doing.