hans hassle, the ceo of plantagon, is planting new seeds for the future of urban farming. plantagon, a leader in vertical urban agriculture, will construct a cutting-edge greenhouse in the swedish city of linkoping, south of stockholm. the aim is to produce more food using less space; to deliver fresh produce at lower cost by marketing directly to consumers; and to embody a new business model, one that makes money while doing good. >> hans hassle, plantagon international. it's a new concept. what is it? >> we are trying to be part of finding technical solutions on how we're going to feed the future really huge megacities of the world. we are sure that we will have many reasons for growing food large-scale inside our cities, and we want to be part of developing those few solutions for how to do that. we do believe that we will have 3 different problems to feed people living inside the city. one is the vast geographical sprawl of the cities. 2040, 2050--most scientists agree that 80% of 9 billion people will live inside cities. and already today, we are using 80% of the arab