I guess I have never worked in a greenhouse for a long period of time. They are hot. With a heated soil and additional height, it is easy imagine being able to grow tropical fruit trees. I've never seen vegetables being grown in troughs before, my experience has always been with them grown on the top of a ridge, I am guessing it has something to do with the tractor tool that was used to prepare the soil and plant.
Huffpo was advertizing a photography book on black dogs which they claimed were not popular. It's hard to believe that when looking at the glossy black lab on the farm.