An urban algae canopy can produce 4 hectares of woodland worth of oxygen. The structure, displayed at Expo Milano, can also produce 150 kilograms of biomass. The canopy houses a fluid rich in microalgae. The microalgae in turn would produce shade, biomass, and a massive volume of oxygen, as TruthTheory details:
The forerunner of the structure has been designed to regulate the transfer of energy, water, and CO2, influenced by several variables including weather patterns, visitor movement, and other environmental factors. Sunlight falling on the structure acts as a catalyst that leads to a synergy between biology and technology. For instance, intense sunlight will induce photosynthesis which will cause the algae to grow. This will diminish the passage of sunlight through the structure and offer shade. The algae are transformed by the process of photosynthesis and grow throughout the prototype.
image via TruthTheory
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