but now signapore wants to reduce its dependence on foreign countries. space is in short supply.so roofs will be turned into vegetable patches and market gardens! the new strategy is already bearing fruit. give -- this is the roof of a popular shopping mall. when bjorn low gave up his career in advertising and started growing papa, semarynd passion fruit here in 2015, people laughed at him. now he is a ught aft expert.thew created 20gardens li thisere in 2015acss the cy.ghed at him. and he's experimenting with new technologies, installed in shipping containers. kale won't grow in tropical climates. t here it rives in a nutrient solution and withed klight, which replaces the sun's rays. vertical cultivation carried out on several floors is seen as a promising trend that can competagainst cotries li neighborg malays that gr food much more cheaply. low says that's because his vegetables are enriched with re nutrien. >> so that there's alsthen additional health care or health benefits to the consumers to justify the price of an additional 20 or 20 cents more -- 20 or 30 cents more we