Moderate difficulty suitable for most players
Metropolis Cultivation: Hydroponic Secrets
Challenging puzzle for experienced crossword solvers
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Across
- 1. Earthworm-processed organic matter nourishing rooftop gardens
- 2. Integrating woody perennials with crops in city landscapes
- 4. Plant developmental response to urban light cycles
Down
- 3. Green cleanup using plants to detoxify contaminated soils
- 5. Soilless cultivation where roots hang suspended in mist
- 6. Carbon-rich residue enhancing urban soil fertility and sequestration
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