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Underwater greenhouses are growing strawberries

washingtonpost.com

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Re: Underwater greenhouses are growing strawberries

#4

where do they mention how light gets to the plants?

It says that the greenhouses are transparent. At 20 feet down that would mean something like 25% of the sunlight is left [1]. I'm surprised that strawberries will grow in that little light, since they don't do as well in the shade.

[1]: Rough estimate based on http://oceansjsu.com/105d/exped_briny/13.html.

Re: Underwater greenhouses are growing strawberries

#5
post #4

where do they mention how light gets to the plants?

It says that the greenhouses are transparent. At 20 feet down that would mean something like 25% of the sunlight is left [1]. I'm surprised that strawberries will grow in that little light, since they don't do as well in the shade. [1]: Rough estimate based on http://oceansjsu.com/105d/exped_briny/13.html .

>25% of the sunlight.

That's probably why their looking into growing fungi.

Re: Underwater greenhouses are growing strawberries

#9

"I see possibilities for developing countries where harsh conditions make it difficult for plants to grow." I wonder what the economics are. This can't possibly be cheaper than traditional greenhouses?

Maybe in desertic and hot countries they are cheaper

Re: Underwater greenhouses are growing strawberries

#10
The real question is if we are changing a very productive system for a not soo good one. Octopuses growth much quicker than strawerries, and are also more expensive. Any aquaculture system in the same area will provide much more human food and better revenues (you are using a 3d volume for production instead a 2d surface).

Marine soil is not apt to cultivate, so you need to put terrestrial soil underwater (or hydroponics), and this is not cheap. There is also a real possibility of contamination of beaches with manure after a storm.

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