The whole planet makes sure that every organism is well nourished, contributing to the health of non-organisms such as water, soil or rocks as well. The principles used resemble the practice of permaculture on Earth where no synthetic pesticides or fertilizers are used, just natural "nutrient-givers" such as compost, returning nutrients back to nature. All the food is shared and services are exchanged, considering the energy circle.
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Principles such as verticle farming on statues made of wood or rocks or gardens on rooftops are also applied, but mostly for aesthetics - much unlike the common garden or forest "houses" where agriculture and housing are intertwined.