Who Knew It Grew From Poo?

“Who knew it grew from Poo?” teaches young readers about the science of aquaponics, a system of aquaculture in which the waste produced by farmed fish or other aquatic animals supplies nutrients for plants grown hydroponically, which in turn purify the water. The approach uses 90 percent less water and can produce up to 3 times more produce at a faster rate than traditional urban gardening. More
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