THE VIRTUOUS CYCLE:

On a recent cool, sunny morning, Meg Caley could be found at Jack's Solar Garden showing visitors a bed of kale plants. As executive director of Sprout City Farms, Caley has more than a decade of experience farming in unlikely urban spaces in the Denver area. Today, about an hour north of the city, she works alongside researchers on an experimental agricultural method called agrivoltaics.

Agrivoltaics is pretty low-tech. Instead of being placed 18 to 36 inches off the ground, as in traditional solar farms, the solar panels are raised significantly higher to accommodate grazing animals and to allow more sunlight to reach plants growing beneath them. 

The approach could be a boon for both energy generation and crop production. Less direct sunlight helps keep plants cooler during the day, allowing them to retain more moisture and thus require less watering. Having plants underneath the solar panels also reduces the amount of heat reflected by the ground, which keeps the panels cooler and makes them more efficient. Farm workers tending the crops also benefit from cooler temperatures, as do grazing animals. 

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