By 2050, the world’s population is predicted to reach about 9.7 billion. The World Bank is calling for innovations that can help in feeding the people. Among the options being discussed is vertical indoor farming.

Vertical indoor farming is the concept of growing food inside establishments via high walls stacked with lush produce  grown under LED lighting. An important part is to keep the plants protected from the outside world.

Supporters claim that it can provide pesticide-free produce that are tastier than other varieties.

However, there still isn’t any clear, neutral research that compares the total environment impact between the whole supply chain of vertical and traditional farming.

One of the most obvious criticisms of indoor farming is the how energy consuming the lighting system is.

Critics suggest that the focus should be on how to use free, non-polluting energy of sun in more innovative ways, like utilizing city space. This could open opportunities for growing food in greenhouses located on the roofs of city buildings.

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