Multiple Choice, Choose Multiple Answers

Vertical farms grow produce on stacked trays under LED light in climate-controlled buildings. Because conditions never vary, yields per square metre are far higher than in a field and water use falls by more than ninety per cent, since transpired moisture is recaptured. The approach also removes the need for pesticides. Its weakness is energy: lighting and cooling account for the bulk of operating costs, so profitability depends heavily on local electricity prices. For that reason commercial operations concentrate on leafy greens and herbs, which are light, quick to mature and command high prices, rather than on staple grains.

Which of the following are stated in the passage? Choose all that apply.

Negative marking — a wrong pick costs a point