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Inside one of the biggest greenhouse in the world, in the Netherlands, which looks like a render, but it's an indoors that provides optimal growing conditions for lettuce and other leafy greens. At Siberia B.V. Each one of the greenhouse's 22 indoor acres yields approx 10 time as much lettuce as traditional outdoor crops and cuts the need for chemicals by 97 percent. (Luca Locatelli / National Geographic) NO SALES, THIS MATERIAL IS FOR SINGLE USE PUBLICATIONS IN PRINT OR FOR A TEMPORARY ONLINE PUBLICATION, AND MAY BE USED EXCLUSIVELY TO PUBLICIZE THE 2018 WORLD PRESS CONTEST AND EXHIBITION. IT MAY NOT BE PUBLISHED AS PART OF AN ARTICLE OR ANY OTHER ITEM THAT CONTAINS NO DIRECT LINK TO WORLD PRESS PHOTO AND ITS ACTIVITIES. THE PICTURE MAY NOT BE CROPPED OR MANIPULATED IN ANY WAY. KEYSTONE PROVIDES ACCESS TO THIS PUBLICLY DISTRIBUTED HANDOUT PHOTO. THE COPYRIGHT IS OWNED BY A THIRD PARTY.