Underground farming

This video is about a London underground farm. With increasing urbanization and a growing world population agricultural land is becoming scarce.

However, by using LED technology it is possible to grow plants beneath the surface (or in buildings). The nice thing of LED is that they can produce light at the frequencies that plants actually need and hence avoiding waste energy on other frequencies.

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4 responses

  1. What did we ever do without LEDs?

  2. That is interesting. He mentions in the video that they try to use renewable energy. I wonder how much energy the farm has to take in overall? In other words, how feasible would this be in, say, a Martian or space colony?

    1. Good question.
      One thing to consider that plants only use 4 percent of sun light. Modern and experimental solar cell designs have an efficiency between 20 and 40 percent.
      So, in theory at least, one square meter of solar array could provide light for between 5 and 10 square meters of LED based farming.

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