"How?" It's the only word she can muster, but seems to do the trick. Dad turns toward her, a faint smile on his tired face. He might regret the Underlord gaining possession of his creation, but who wouldn't be proud of what he's done?
Water from trash.
"You gave me the idea, Didi," he says, soft and with excitement in the back of his words. "Cyborg technology adapted to reverse the waste process."
She sees it, can almost trace his thought process backward until it glows in her mind like a lightbulb. "Instead of water to waste, waste to water!"