How do algae-tubes installed on buildings help reduce GHG emissions?



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    Algae are photosynthetic, meaning that they use light to convert water and carbon dioxide into oxygen and, well, more algae. This way they offset the emissions of CO2 (which is a major greenhouse gas) and give us back some oxygen to breathe. It’s the same effect as growing plants on roofs, except you don’t need to worry about root systems damaging the roof. There is also a possibility to harvest the extra algae (as it will keep growing in good enough conditions) for use as a source of biofuel, which may result in some further offset of CO2 emissions.

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