Demonstrated overall conversion efficiencies for CO2 to fuels are already in the 25-50% range, depending on the fuel. We are confident we can get to at least 50% for our process. We will not be taking renewable power away from other uses - in the short term we'll be using marginally useful power (wind at midnight, solar at noon, etc), as we need the power to be low cost, and any time it has higher value uses, it won't be cheap enough. So we are not removing it from other beneficial use. Also, as we scale, we will cause much more solar and wind power to be available as we will be buying a lot of it. In the long term, aviation and shipping are likely to still use liquid fuel, yes.