
The inside of a skyscraper is, literally, the most expensive "land" in the world. So it probably isn't the best place to grow our food.
The idea of vertical farming (growing food in high-rise buildings in the middle of cities instead of out on farms) has been gaining a lot of interest lately. Most recetly, it showed up on BoingBoing, one of our favorite blogs. We've seen a few of these proposals, and we've been following the concept for some time. It seems EcoGeeky enough, but a quick glance at the actual economics of farming shows that this isn't ever going to work.
At first, it seems to make all the sense in the world. Moving production of food into population centers to eliminate shipping. Creating highly efficient "food factories" that allow land elsewhere to be freed from cultivation. But when you look at some of the practicalities behind constructing buildings like these, vertical farms make no sense. As the Vertical farm Project itself notes: "The Vertical Farm must be efficient (cheap to construct and safe to operate)." And a vertical farm is the opposite of efficiency.
A farmer can expect his land to be worth roughly $1 per square foot...if it's good, fertile land. The owner of a skyscraper, on the other hand, can expect to pay more than 200 times that per square foot of his building. And that's just the cost of construction. Factor in the costs of electricity to pump water throughout the thing and keep the plants bathed in artificial sunlight all day, and you've got an inefficient mess.
Just looking at those numbers, you need two things to happen in order for vertical farms to make sense. You need the price of food to increase 100 fold over today's prices, and you need the productivity of vertical farms to increase 100 fold over traditional farms. Neither of those things will ever happen. And as much as I hate to burst bubbles, the main claim to the efficiency of vertical farms (the elimination of transportation costs) is not vaild. Even if most of the calories we consume were to be grown inside of cities, almost all of it would be shipped out for processing (most of the food we eat isn't fresh veggies...you may have noticed.)
None of this is to say that we think farming will remain forever as it is today. EcoGeek is glad that there are many changes coming to agriculture, some of which will increase yields enough to keep prices low while feeding the 10 billion people the Earth will house by 2050. And with the right technologies, we should be able to do this without harming the Earth too much.
We're not even saying that farms will remain outside. Building multi-level (not necessarily muti-story) automated farming units on inexpensive land within 100 km of food processing plants, for example, might make a lot of sense. But if you're going to make farming more efficient, you aren't going to do it by moving it into the most expensive land in the world.
Science-fiction author (and former EcoGeek of the Week interviewee) Tobias Buckell also saw the article and offered his own comments on the topic, as well.
'Vertical farm' articles on EcoGeek

written by Corban, October 26, 2009
written by Hanksug, October 26, 2009
written by tchamp, October 26, 2009
written by Andrew, October 26, 2009
written by Teko, October 26, 2009
written by Stevon Roberts, October 26, 2009
written by Jaime, October 26, 2009
written by Amy, October 26, 2009
written by Elijah, October 27, 2009
I don't see it being fiscally solvent without renting out the other 90%+ of the building in office space..
But green roofs and walls serve huge benefits in temperature control and air purification. Who wouldn't want to work in that office.
Is a green wall a kind of vertical farm? or visa versa ?
written by Gorper, October 27, 2009
written by sarah, October 27, 2009
but lots of stuff is grown in fertilizer and manure...and maybe something useful to cities could be grown there... perhaps biomass? then it wouldn't fight for farmland.
written by Jacob, October 27, 2009
written by Hank, October 27, 2009
They're writing about it because it's sensational and interesting and there are lots of pretty pictures. And that's the end of it.
I think what I'm doing is better than that, if only because I'm trying to present you with some details and don't claim to be the beginning and end of factual information.
written by Doc Rings, October 27, 2009
Keep going, Hank!
written by valves supplier, October 27, 2009
written by Free ringtones, October 27, 2009
written by Jeneva, October 27, 2009
written by Joshua Scott, October 27, 2009
That's my two cents, from someone whose business relies upon it
written by Carl Hage, October 27, 2009
A one layer farm uses daylight for solar energy-- to grow vertically electric lights are required. In the article, they propose burning crop residue to generate the electricity for the lights (and excess for city), but since plants are very inefficient in energy conversion, much more energy would be required for electric lights than what could be recycled from biomass.
written by Jolly Giant, October 28, 2009
I'm looking for a transmission tower to plant next years string beans.
written by vestar, October 28, 2009
And according to my calculation the yeild is 10 times which could help
written by Movie-Trailer.com, October 28, 2009
written by Green Ninja, October 28, 2009
This will not be the ONLY answer, as people in urban centers will inevitably have to adopt self-sustainable gardens in some fashion or another in order to supplement their needs in a practical way. The system isn't perfect yet, but we're getting there, slowly but surely.
written by stefan malner, October 28, 2009
see video: Hybrid Solar Lighting System Employing Fiber Optic Cables
http://www.youtube.com/watch?v=DBsmkHcFd3I
There are more videos on youtube, but this was the first I found.
written by Michaelc, November 01, 2009
There are already several urban projects doing hydroponic and aquaponic (combined fish and crop) greenhouses on the tops of buildings and on piers and they are quite profitable.
Of course you could do these same type of projects in the less expensive real estate outside of the city, but the comparison of conventional farming vs hydroponics shows hydroponics uses less energy, land, water, fertilizer, insecticide, and creates less chemical runoff and less opportunity for contamination.
written by octopod, November 01, 2009
written by true religion jeans on sale, November 03, 2009
written by RJ, November 05, 2009
On the other hand: The cost of building skyscrapers is huge. The cost of running them is huge. Few people have begun to grapple with the cost of replacing them when they reach their use-by dates, but it will be huge.
None-the-less, skyscrapers are spectacular. People with more money than sense (and people who have easy access to other people’s money) love them. The images of immense vertical gardens are spectacular. Ditto.
So where does that lead us? Nowhere. At least in most western countries, building skyscrapers is not an alternative to sprawling suburbs; they are conjoined twins. Vertical gardens are the companions, not the replacements, for the parking lots around the mega-malls. This vertical garden fad is almost as much help as contemplating Paris Hilton’s reading habits would be for planning a Sunday dinner. Go for it Hank. Pull the plug.
Clusters of skyscrapers surrounded by vast low-density suburbs are not the only option for urban development. The media may believe that manufacturing big sparkling celebrities surrounding by masses of tiny dull admirers is the best way to entertain people, but it is not the model for sustainable cities.
written by Derrick Gibson, November 05, 2009
Attempts to transform human kind into some sort of benevolent force for world peace, are as likely to fail as every other utopian concept ever tried; attempts to figure out how to make what people are already doing just a little bit better, well - we call that progress.
People live in cities; people like living in cities. People eat veggies; people like eating veggies. It doesn't seem like an impossible goal to figure out ways to put the people and the veggies closer together.
written by kathy puder, November 05, 2009
some methods to this type of farming is costly but
you have to look at all the variables before you deduce
that something does or does not make sense. Dynoponic
farming grows food WITHOUT using water. That eliminates
one variable. Hydroponic farming does use water,but
you can use rain water collected from rain barrels to
water the plants which offers another sustainable alternative. You have to read and learn about green
technology almost daily to get insight into sustainable
living because it's ever advancing, so keep reading and
start broading your perspective because every community
is different and has different needs. It ALWAYS makes
sense to plant and smaller farms yield better produce
than bigger farms,anyway. Vertical Farming DOES make sense.
written by Summer Fields, November 06, 2009
written by Bobby, November 06, 2009
written by Kevin, November 06, 2009
written by kim holder, November 06, 2009
For that matter, the whole economic evaluation is silly. You don't calculate the profitability of a business based on the cost of constructing the building it will be in. The question for vertical farms is how much revenue they will generate per square foot versus the costs of production. Skyscrapers often rent for something like $30 or $40 per square foot. If you really must make a direct comparison, that's the number to look at.
This article was referred to on fastcompany, where i saw it and picked up on the bad math. There are a lot of good comments here that challenge the false argument and lack of detail of the article itself. It's like a lot of these blog magazines these days - the comments are smarter and have more information than the article. And yet we don't get paid.
written by ryan, November 07, 2009
And there are various crops that it is currently possible to grow indoors for profit. I'm pretty sure that it is already possible to rent space in a skyscraper and make money growing marijuana, orchids, and possibly other plants. Gourmet mushrooms are grown in retro-fitted warehouse space in urban areas; they seem like at least one food that could be profitably grown in a skyscraper. Maybe those are cherry-picked examples, but the point is that the idea of farming in a building can't be completely dismissed. The idea of vertical farming isn't just to eliminate fuel costs, but to also design a building as a system and find benefits from the vertical aspect.
written by Ted Marchildon, November 07, 2009
written by Sustainable Living, November 12, 2009
written by kefir, November 12, 2009
written by CH, November 13, 2009
Second, let me continue with the fact that many crops such as tomatoes, cucumbers, peppers and strawberries are already grown vertically. (Not to mention profitably by many growers around the world.)
The biggest concerns should actually be availability of "good" water, qualified labor and quality light.
With good water, light, and labor. . .many locations become viable options for the production of food.
written by Torsten Klasen, November 14, 2009
However if one was to find an alternative building solution, that would involve lower construction costs, it would make sense to investigate that option.
We have been building the same type of building envelope for many years and cannot change the most common denominator of the system "the labour". With labour costs as high as they are, and even climbing higher, it understandable that the cost of construction outways the benefits of the vertical farm.
We have been working on a solution to provide a vertical farm for the market for about 7 years, and are comming closer to the solution as each year passes.
Trying to feed 10 Billion people over by the year 2050 with abundant food and nutrients seems like a hard task, but it is possible to achieve.
Help us make a difference in the industry by joining us to cfreate a substainable future through vertical farming, either in the city or outside of it.
Cheers and take care.
Torsten Klasen
lexCoat International Inc.
written by otis, November 14, 2009
An effective vertical farm will have to not only bring construction costs down, but it will also have to master energy consumption and self-sustainable technologies.
Hydroponics and aeroponics provide amazing crop yields, compared with traditional farming, and I don't think it will be long until we begin seeing giant leaps and bounds in this industry.
written by Mandarin Chinese Online, November 17, 2009
it's really cool!
and very health!
written by jose, November 17, 2009
written by gucci canvas wallets, November 21, 2009
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