arming to the mega farm level, in a region of the country known more for its massive hog, corn and soybean farms than for crops of boutique greens.</p><p>here is a run-down on the trend, this farm ??? and the challenges it and other indoor farms face.</p><p><b>WHAT ARE THESE FARMS LIKE?</b></p><p>In Chicago, Milwaukee and other urban areas, entrepreneurs have taken up residence in vacant building