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It's not stupid by any means, and backwards is when you once had something and then you stop having it, they stop providing it to you as a service.
My partner is already thinking in this direction, in Bulgaria the systems for buffering the lack of water are rather underground and not on the roof, at least that's what I know. And no, it doesn't rain much here, I think it hasn't rained all summer, it just started raining now. But as I said, the problem here is not the lack of water, but the lack of desire to repair the outdated and damaged water network.