> biogas If your objective is to eliminate carbon emissions, this won't do that. I'm not a purist though, if a small amount of natural gas or biogas needs to b

> biogas If your objective is to eliminate carbon emissions, this won't do that. I'm not a purist though, if a small amount of natural gas or biogas needs to be burned at peak load that's not a huge deal. > Batteries for intra-day storage What do you do when cloudy + no wind lasts for much more than a day (as can happen in winter)?