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This is my grandfather.
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And this is my son.
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My grandfather taught me to work with wood
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when I was a little boy,
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and he also taught me the idea that
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if you cut down a tree to turn it into something,
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honor that tree's life and make it as beautiful
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as you possibly can.
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My little boy reminded me
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that for all the technology and all the toys in the world,
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sometimes just the small block of wood,
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and if you stack it up tall,
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actually is an incredibly inspiring thing.
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These are my buildings.
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I build all around the world
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out of our office in Vancouver and New York.
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And we build buildings of different sizes and styles
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and different materials, depending on where we are.
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But wood is the material that I love the most,
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and I'm going to tell you the story about wood.
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And part of the reason I love it is that every time
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people go into my buildings that are wood,
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I notice they react completely differently.
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I've never seen anybody walk into one of my buildings
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and hug a steel or a concrete column,
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but I've actually seen that happen in a wood building.
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I've actually seen how people touch the wood,
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and I think there's a reason for it.
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Just like snowflakes, no two pieces of wood
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can ever be the same anywhere on earth.
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That's a wonderful thing.
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I like to think that wood
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gives Mother Nature fingerprints in our buildings.
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It's Mother Nature's fingerprints that make
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our buildings connect us to nature in the built environment.
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Now, I live in Vancouver, near a forest
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that grows to 33 storeys tall.
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Down the coast here in California, the Redwood forest
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grows to 40 storeys tall.
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But the buildings that we think about in wood
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are only four storeys tall in most places on earth.
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Even building codes actually limit the ability for us to build
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much taller than four storeys in many places,
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and that's true here in the United States.
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Now there are exceptions,
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but there needs to be some exceptions,
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and things are going to change, I'm hoping,
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and the reason I think that way is that
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today half of us live in cities,
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and that number is going to grow to 75 percent.
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Cities in density mean that our buildings
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are going to continue to be big,
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and I think there's a role for wood to play in cities.
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And I feel that way because three billion people
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in the world today, over the next 20 years,
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will need a home.
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That's 40 percent of the world that are going to need
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a new building built for them in the next 20 years.
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Now, one in three people living in cities today
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actually live in a slum.
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That's one billion people in the world live in slums.
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A hundred million people in the world are homeless.
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The scale of the challenge for architects
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and for society to deal with in building
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is to find a solution to house these people.
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But the challenge is, as we move to cities,
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cities are built in these two materials,
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steel and concrete, and they're great materials.
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They're the materials of the last century.
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But they're also materials with very high energy
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and very high greenhouse gas emissions in their process.
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Steel represents about three percent
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of man's greenhouse gas emissions,
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and concrete is over five percent.
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So if you think about that, eight percent
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of our contribution to greenhouse gases today
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comes from those two materials alone.
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We don't think about it a lot, and unfortunately,
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we actually don't even think about buildings, I think,
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as much as we should.
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This is a U.S. statistic about the impact of greenhouse gases.
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Almost half of our greenhouse gases are related to the building industry,
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and if we look at energy, it's the same story.
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You'll notice that transportation sort of second
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down that list, but that's the conversation we mostly hear about.
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And although a lot of that is about energy,
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it's also so much about carbon.
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The problem I see is that, ultimately,
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the clash of how we solve that problem
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of serving those three billion people that need a home
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and climate change are a head on collision
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about to happen, or already happening.
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That challenge means that we have to start thinking in new ways,
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and I think wood is going to be part of that solution,
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and I'm going to tell you the story of why.
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As an architect, wood is the only material,
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big material that I can build with
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that's already grown by the power of the sun.
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When a tree grows in the forest and gives off oxygen
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and soaks up carbon dioxide,
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and it dies and it falls to the forest floor,
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it gives that carbon dioxide back to the atmosphere or into the ground.
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If it burns in a forest fire, it's going to give that carbon
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back to the atmosphere as well.
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But if you take that wood and you put it into a building
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or into a piece of furniture or into that wooden toy,
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it actually has an amazing capacity
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to store the carbon and provide us with the sequestration.
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One cubic meter of wood will store
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one tonne of carbon dioxide.
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Now our two solutions to climate are obviously
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to reduce our emissions and find storage.
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Wood is the only major material building material
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I can build with that actually does both those two things.
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So I believe that we have
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an ethic that the earth grows our food,
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and we need to move to an ethic in this century
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that the earth should grow our homes.
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Now, how are we going to do that
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when we're urbanizing at this rate
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and we think about wood buildings only at four stories?
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We need to reduce the concrete and steel and we need
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to grow bigger and what we've been working on
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is 30-storey tall buildings made of wood.
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We've been engineering them with an engineer
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named Eric Karsh who works with me on it,
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and we've been doing this new work because
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there are new wood products out there for us to use,
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and we call them mass timber panels.
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These are panels made with young trees,
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small growth trees, small pieces of wood
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glued together to make panels that are enormous:
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eight feet wide, 64 feet long, and of various thicknesses.
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The way I describe this best, I've found, is to say
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that we're all used to two-by-four construction
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when we think about wood.
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That's what people jump to as a conclusion.
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Two-by-four construction is sort of like the little
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eight-dot bricks of LEGO that we all played with as kids,
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and you can make all kinds of cool things out of LEGO
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at that size, and out of two-by-fours.
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But do remember when you were a kid,
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and you kind of sifted through the pile in your basement,
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and you found that big 24-dot brick of LEGO,
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and you were kind of like,
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"Cool, this is awesome, I can build something really big,
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and this is going to be great."
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That's the change.
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Mass timber panels are those 24-dot bricks.
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They're changing the scale of what we can do,
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and what we've developed is something we call FFTT,
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which is a creative commons solution
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to building a very flexible system
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of building with these large panels where we tilt up
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six stories at a time if we want to.
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This animation shows you how the building goes together
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in a very simple way, but these buildings are available
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for architects and engineers now to build on
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for different cultures in the world,
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different architectural styles and characters,
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in order for us to build safely,
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and we've engineered these buildings, actually,
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to work in a Vancouver context,
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where we're a high seismic zone,
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even at 30 stories tall.
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Now obviously, every time I bring this up,
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people even, you know, here at the conference, say,
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"Are you serious? Thirty storeys? How's that going to happen?"
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And there's a lot of really good questions that are asked
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and important questions that we spent quite a long time
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working on the answers to as we put together
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our report and the peer review report.