It doesn’t matter if they’re efficient relative to the space taken, if the space taken is functionally 0 (since the space isn’t used for anything else). The poleward side of an east-west canal could also just be cloth or some other kind of shade to lower install costs!
It doesn’t matter if they’re efficient relative to the space taken, if the space taken is functionally 0 (since the space isn’t used for anything else). The poleward side of an east-west canal could also just be cloth or some other kind of shade to lower install costs!