> And, you add some antifreeze to your toilet, after you flush it to empty the tank. If we're talking catastrophic, persistant, total grid collapse, you won't

> And, you add some antifreeze to your toilet, after you flush it to empty the tank. If we're talking catastrophic, persistant, total grid collapse, you won't want a flushing toilet. It'll be time to start doing nutrient recycling instead of relying on industrially applied fertilisers to crops -- because that infrastructure depends largely on the other and will inevitably collapse too. You'll be wanting a composting toilet.