Which agricultural innovation saves up to 90% water and is suitable for urban environments?

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A Traditional surface irrigation
B Shifting cultivation
C Aeroponic towers
D Flood irrigation

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Answer: C. Aeroponic towers

Aeroponic towers grow plants with roots hanging in the air, misted with nutrient water that is recycled, so they can use up to about 90% less water. Being vertical, they fit rooftops and balconies in cities.

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Which agricultural innovation saves up to 90% water and is suitable for urban environments?

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