Fig. 4: EUP estimates from literature and the energy prudence index. | Nature Communications

Fig. 4: EUP estimates from literature and the energy prudence index.

From: Contextual conditions define maximum energy-use threshold in low-carbon controlled environment agriculture for agri-food transformation

Fig. 4: EUP estimates from literature and the energy prudence index.

The vertical dot chart illustrates the estimated EUP of both greenhouses and indoor farming setups in various countries from the current literature. Greenhouse benchmarks are colour-coded in green, while indoor farming benchmarks are colour-coded in orange. The estimate asterisked for growing tomatoes in Canada denotes the use of other energy forms for heating requirements. If heating requirements are fully electrical-based, estimates will be much higher. The blue line represents where EUP meets the MET perfectly. A positive displacement to the right signifies higher energy use to the MET, which is not desirable, and a negative displacement to the left signifies lower energy use to the MET. The equation to calculate the Energy Prudence Index is showed above the country code legend.

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