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Several factors influence sliding patio door costs, including the door and glass type, door size, material — vinyl, fiberglass, wood or aluminum — and number of panels. Whether you’re ...

This “smart lighting” could potentially cut vertical farms’ electricity costs by up to 12 percent, says Leo Marcelis, a horticulturist at Wageningen University in the Netherlands.

Vertical farming systems, which grow plants intensively in an indoor setting, could be part of the answer—but to use them on a large scale we need to overcome key problems, especially the ...