Singapore has one of the highest population densities on the planet. More than five million
people crowd into this small wealthy island city. Land here comes at a premium, forcing
people to expand up rather than out.
And it's not just office towers and apartment complexes that are reaching skyward.
Singapore now has one of the world's first commercial vertical farms. It's called SkyGreens.
This is the framework. The greenhouse
50 year old entrepreneur, Jack Ng, an engineer by training, is the farm's owner and designer.
Translucent structures, nearly four stories tall line the property. On the inside automated
towers of vegetables rotate like Ferris wheels in slow motion between a nutrient-infused
bath below and the sun above. Ng says each tower is powered by a gravity-fed water wheel.
It's an ancient technology with a modern twist.
at the top. Ng says one of the biggest benefits of this closed loop, hydraulic system is how
little energy it consumes.
electricity we use in Singapore it's three dollars per month [steve couldn't understand]
That's three dollars a month to run this entire tower... or about the same amount of electricity
used in single 60-watt lightbulb.
You can try the lettuce. OK it's fresh.
Eating local, freshly picked greens is a luxury in Singapore. With just 250 acres of farmland
left, the city grows only seven percent of the produce it consumes. That may be an extreme
case, but it represents a looming problem facing cities all over the world, says Columbia
University ecologist, Dickson Despommier.
We're going to reach a tipping point really soon where traditional ag can no longer provide
enough food for the people living on the planet.
Despommier says producing enough food for the three and a half billion people living
in cities today requires an amount of land twice the size of South America.
Now that would be ok if we could stabilize our population at 7 billion. But that's not
going to happen.
Despommier believes that 80 percent of the world's population will be living in cities
by 2050... making today's challenges seem trivial by comparison.
So the question arises, can we supply enough food for everybody on the planet including
a growing urban population. And I think we can. And I think we can do it by empowering
people in the cities to grow food right there.
SkyGreens' vertical farm offers one example of how that may be possible, not just technically
but also economically. The system is ten times more productive per square foot than conventional
farming. It also takes a lot less water, labor and chemical inputs.
Doctor Lee Sing Kong directs Singapore's National Institute of Education.
I think eventually urban factories for vegetable production would take place in place of electronic
factories in Singapore.
But Lee says visit any Singapore restaurant and you can see just how far the country is
from being self-sufficient.
If you look at the plate of food on the table, say vegetables, it could come from China,
it could come from the neighboring countries of Indonesia or Malaysia or it could come
in terms of salad greens, as far off as the US and the European countries like Holland
or Australia....
Maintaining that supply of food from so many foreign sources is a monumental task. Every
night hundreds of trucks enter Singapore from Malaysia and beyond, unloading their cargo
of fruit and vegetables at this central wholesale market. From here the food is loaded onto
smaller trucks and delivered throughout the city before sunrise.
More than 90 percent of the food in Singapore's grocery stores like this one comes from foreign
countries. That makes local, urban produce like SkyGreens a premium novelty for customers.
But to some it's much more than that. It's an insurance policy.
Supermarkets buy food from dozens of other countries as a defense against climate-related
disruptions in the global food chain. But the National Institute of Education's Lee
Sing Kong, says that even that may not be enough to guarantee a steady food supply in
the future.
We do anticipate that the need for our own production to a certain level of self-sufficiency.
I think the government has set a target -- initial target of 10% to 20% of our need and if we
can achieve that I think there will be a great feat that we have attained.
Singapore recently invested 20 million dollars in a fund to boost domestic food production
through new farming technologies like SkyGreens. But Lee says incentives alone aren't ENOUGH
First, he says, high rise farming needs to be cost competitive.
Whatever we produce in Singapore must compete with the prices of vegetables coming in Singapore.
// So that's why the government in Singapore is now encouraging// models of urban farming
that can really not just increase productivity but also lowering cost of production
Skygreens owner Jack Ng says he's confident he can compete. Three years into his experiment,
he says his operating costs are only a quarter of what it would cost to run a conventional
farm.
And since he's local, his transportation costs are also minimal, making his fresh lettuce
and chinese cabbage price-competitive with mass-produced, cheap imports.
But most importantly, Ng says they taste better. He says the "same day" freshness of his greens
is a real selling point.
So far my customer keep on asking us, can you produce more, can you supply more?
Ng has raised 28 million dollars in public and private money to more than quadruple his
capacity over the next year and a half.
And in fast rising Singapore, that seems like a smart investment.