The species in this building is higher  than the species on the ground park.

Oh, really?

Yeah.

Which is right nearby.

So– Wait.

So there's more species  within this construction...

Within this.

Than in like a natural space of...

Correct.

The same amount of greenery?

Yeah.

Correct.

That's incredible.

Thinking about an  entire city built like this... Basically, you're  talking about reforestation and urbanization as  sort of one and the same.

Correct.

In every city I’ve ever lived in, green spaces  felt like an escape.

They were in the city,  not of the city.

But here in Singapore,  nature is always around you.

And that’s by design – a design that’s not only benefiting our own  species, but other species too.

So what can we learn from Singapore?

How do  you design and build an environment where nature and urban living coincide,  and even thrive together?

I’m Shane Campbell-Staton, and  this is Human Footprint.

Is it your first time in Singapore?

It is.

Man this place, it’s, I've never seen anything like it.

It's incredible.

If you ask Pearl Chee, she’ll tell you it’s no miracle.

It's all part of the plan.

We are challenging ourselves as architects.

Whether we can design better… We are creating a lot of concrete buildings, it’s like a concrete jungle.

But  we really want to bring the jungle in.

Pearl is the architect who  designed the Kampung Admiralty, the building we’re standing in now.

Our design concept, it's a very unique combination.

We actually have elderly housing,  public housing, combined with healthcare, which is a medical center, commercial and some  social programs, and a food court.

Yeah.

Oh wow.

So that’s why it’s not gated.

It’s very open.

Anybody can actually  come in and use the facilities here.

Singapore is the third most densely populated  city in the world.

The entire country is an island with only 281 square miles of  land, but 5 ½ million people live here.

In a city this dense you wouldn’t expect  much room for nature.

But it’s like they say: where there’s a will, there’s a way.

And by will, I mean law.

Legislation enables it to happen.

The building took the land.

So we need to do replacement.

The legislation actually requires  a building to give back 100% landscape.

Oh!

100% of the site footprint has to be replaced into the building.

Every square inch of green space that you take up, you have to put back in...

Put back in, yeah.

into the building somehow.

…into the building.

A few years after completing the building,  Pearl’s firm surveyed the animal life in Kampung Admiralty’s gardens.

Fifty  different species had moved in.

This development is a microcosm of what’s  happening all over Singapore.

It’s not just one building, or designer, or architecture  firm – the whole city is teeming with life.

As a biologist, I think a lot about  sort of wildlife, specifically in urban spaces and how urban environments can be very  stressful, very different environments.

But your job has been the opposite,  to make urban environments very much like wild environments in a lot of ways.

What is your approach to increasing  biodiversity in a space like this?

So visually, we want to have some  interest in the landscape.

Secondly, we introduce a lot of edibles.

So you see  a lot of fruit trees actually here.

That attracts the birds, mammals, and insects.

Also, because we did it in a cascading form, so it's actually quite connected all  the way to the ground floor.

The landscape is actually connecting.

We have a system of collecting the water as well.

That's why the cascading planters, the water  actually get filtered through all the way.

Just by gravity?

By gravity.

Yeah.

We have cascading landscape over there.

The planters and the water can come through  under the planter.

Actually, this is a rain garden that collects all the filter water... Oh, wow.

... from all the planters.

Then, it gets stored in  the tanks underneath the apartment blocks.

We have two rainwater harvesting tank underneath.

Whoa.

Yeah.

And then get pumped up and rewater  again.

So, we're trying to recycle water.

As you sort of move around the city now,  do you go to places and you're like, "Oh this is my baby?"

Yeah, yeah.

All the time… Professor Cheong Koon Hean is a music  lover and life-long Singaporean.

She’s also a legendary urban  planner.

A lot of folks credit her with shaping Singapore’s  singular urban landscape.

This is one of my favorite neighborhood centers  in a public housing estate.

Because in Singapore, 80% of the people live in public  housing in estates like this.

Oh wow.

In highly affordable housing.

Kampung Admiralty, the building Pearl  Chee designed, is public housing too.

And these places are cush.

The apartments are modern and clean, the amenities are incredible, and  most developments are a 10-minute or less walk from public transportation.

And of course, everything is draped in greenery, from the street level to the  tops of the skyscrapers.

Where I come from, when we say public housing,  basically we call it the projects.

And I was actually raised a lot in public housing.

And that public housing and this public housing are not the same thing.

Well, you can’t believe it when you come to Singapore today, but say about  60-70 years ago, actually, Singapore was a nation of slums and squatters.

It was also  polluted and lots of traffic congestion.

…Singapore was a British colony.

And  actually if you look at the transition in 1819 when the British  so-called founded Singapore; we had like 200 people on the island.

Oh, wow.

But today we are 5.7 million.

So you can imagine  that rapid urbanization that took place.

When Singapore gained its sovereignty from  Britain in 1959, it was a city of 1.5 million people and massive, unplanned sprawl.

Tens of thousands of people had no place to live.

So the newly elected government created  the HDB, or Housing and Development Board.

And within five years, the HDB, they already built  51,000 units of flats… It started from very basic housing, but now of course the quality is  a lot better as can see around you.

Yeah.

And public housing is just the beginning.

Singapore is a very small city-state.

It’s  actually only half the size of metropolitan London.

Oh wow.

But we are a country, we are not just a city.

So  everything you need about a country, whether it’s for water, power generation, ports, airports, plus  housing, shops, offices, industry, all has to be built within this tiny island city-state.

And so biodiversity and ecological balance became really quite an important concept.

Now, as we develop the land, of course we start to lose space for planting.

So what did we do?

We  decided to move the greenery upwards into the sky… And so what you did is you  just created a new space, and suddenly you bring back  all the biodiversity.

Back in the States, urban areas  and wildlife are sort of like oil and water.

They don’t mix very  well.

But what you’ve done here is something very, very different.

Over the years, we moved from being a garden city to a city in the garden because  we started to plant so extensively.

And in the last decade or so we moved from a city  and a garden, to city in nature.

In a place where you have limited space and you  have this growing population that there are two very sort of competing needs.

Shane, absolutely there's always competing needs.

Right?

So it's really this  very important balancing act of allocating the right amount of land for different uses,  to create this type of an environment.

So what do you think a Singaporean gains by having nature sort of infused within the urban  environment as opposed to setting aside natural park space, like national parks?

There's a lot of science behind planting.

For example, to thermal comfort.

And the right plants, if it's planted along  pathways, it provides a lot of shade.

Despite being an island nation where 100% of  its population lives in urban areas, this city-state is known as the greenest city in Asia.

Here, “green” takes on many meanings - and high on that list is shelter from the sweltering  heat in this tropical environment.

Plants and vegetation play a big part of that, lowering the  air temperature by 1 to 2 degrees Celsius!

So in fact, in the design of the towns,  we use a lot of computer models.

The way you juxtapose your buildings with parks  and open spaces, you bring in the breezes, which is important to cool the town and for  better air quality and natural ventilation.

And of course we bring back biodiversity.

If  you plant the right type of plants, you can get back the butterflies, and the dragonflies, and  you get the Monitor lizards coming back.

Yeah, I’ve seen several really  large monitor lizards in the city!

And who orchestrates this balancing  act?

It’s the Singaporean government, with their comprehensive “Master Plan” for  managing the city-state’s ongoing growth.

By centralizing the control of urban development,  Singapore paves the way – you see what I did there – for projects that fuse function and form.

If you look behind us… The Punggol waterway is actually a man-made river.

We dammed up two  rivers… to become freshwater reservoirs.

Now, the engineers wanted to connect the two  reservoirs with a pipe.

Very functional.

Yeah.

But then the architects and the planners say, why  do a pipe?

Why don't we make a river?

And so this river connected the two reservoirs to balance and optimize the storage  of water, but at the same time, it became a leisure facility.

So Punggol has a  nickname - it’s the Venice of Singapore.

Oh, that's amazing.

Because we brought in water, right?

It has its aesthetics, but  everything out also serves… Function, yes a function.

A very specific function.

Even the Punggol Waterway, there's a  family of otters that have come back.

Oh, that's incredible.

They live on the Punggol Waterway.

Singapore challenges a lot of what I thought I knew about cities.

No one’s saying that we should all be like Singapore, or even that we could be.

This place is unique.

Ninety percent of Singapore’s land is publicly owned.

The government determines what gets built, and where.

And with everyone sharing the same tiny island, by definition, they’re all in this together.

Most places don’t have all that.

But I’m not sure we need it to re-imagine what cities can be.

I think the thing that stands out to me about Singapore is the intentionality.

I'm not sure if this specific model can be applied… anywhere or everywhere, but I think they're doing things that… I think other cities can learn from.

We have to get our act together to make cities effective.

Creativity, innovation and that will to survive and to want to do well are very, very strong drivers.

That’s human beings, right?

That’s what we are.

If you want more Human Footprint, you can tune in to the full length series on the PBS App or on your local PBS station.