Topic 2. Michel Pawlin. Using nature’s genius in architecture.

https://www.ted.com/talks/michael_pawlyn_using_nature_s_genius_in_architecture/transcript? language=en

3: 21 So I think the Eden Project is a fairly good example of how ideas from biology can lead to radical increases in resource efficiency -- delivering the same function, but with a fraction of the resource input. And actually there are loads of examples in nature that you could turn to for similar solutions. So for instance, you could develop super-efficient roof structures based on giant Amazon water lilies, whole buildings inspired by abalone shells, super-lightweight bridges inspired by plant cells. There's a world of beauty and efficiency to explore here using nature as a design tool.

3: 55 So now I want to go onto talking about the linear-to-closed-loop idea. The way we tend to use resources is we extract them, we turn them into short-life products and then dispose of them. Nature works very differently. In ecosystems, the waste from one organism becomes the nutrient for something else in that system. And there are some examples of projects that have deliberately tried to mimic ecosystems. And one of my favorites is called the Cardboard to Caviar Project by Graham Wiles. And in their area they had a lot of shops and restaurants that were producing lots of food, cardboard and plastic waste. It was ending up in landfills. Now the really clever bit is what they did with the cardboard waste. And I'm just going to talk through this animation.

4: 34 So they were paid to collect it from the restaurants. They then shredded the cardboard and sold it to equestrian centers as horse bedding. When that was soiled, they were paid again to collect it. They put it into worm recomposting systems, which produced a lot of worms, which they fed to Siberian sturgeon, which produced caviar, which they sold back to the restaurants. So it transformed a linear process into a closed-loop model, and it created more value in the process. Graham Wiles has continued to add more and more elements to this, turning waste streams into schemes that create value. And just as natural systems tend to increase in diversity and resilience over time, there's a real sense with this project that the number of possibilities just continue increasing. And I know it's a quirky example, but I think the implications of this are quite radical, because it suggests that we could actually transform a big problem -- waste -- into a massive opportunity.

5: 24 And particularly in cities -- we could look at the whole metabolism of cities, and look at those as opportunities. And that's what we're doing on the next project I'm going to talk about, the Mobius Project, where we're trying to bring together a number of activities, all within one building, so that the waste from one can be the nutrient for another. And the kind of elements I'm talking about are, firstly, we have a restaurant inside a productive greenhouse, a bit like this one in Amsterdam called De Kas. Then we would have an anaerobic digester, which could deal with all the biodegradable waste from the local area, turn that into heat for the greenhouse and electricity to feed back into the grid. We'd have a water treatment system treating wastewater, turning that into fresh water and generating energy from the solids using just plants and micro-organisms. We'd have a fish farm fed with vegetable waste from the kitchen and worms from the compost and supplying fish back to the restaurant. And we'd also have a coffee shop, and the waste grains from that could be used as a substrate for growing mushrooms.

6: 43 So the final project I want to talk about is the Sahara Forest Project, which we're working on at the moment. It may come as a surprise to some of you to hear that quite large areas of what are currently desert were actually forested a fairly short time ago. So for instance, when Julius Caesar arrived in North Africa, huge areas of North Africa were covered in cedar and cypress forests. And during the evolution of life on the Earth, it was the colonization of the land by plants that helped create the benign climate we currently enjoy. The converse is also true. The more vegetation we lose, the more that's likely to exacerbate climate change and lead to further desertification. And this animation, this shows photosynthetic activity over the course of a number of years, and what you can see is that the boundaries of those deserts shift quite a lot, and that raises the question of whether we can intervene at the boundary conditions to halt, or maybe even reverse, desertification.

8: 51 We're working with the guy who invented the Seawater Greenhouse. This is a greenhouse designed for arid coastal regions, and the way it works is that you have this whole wall of evaporator grills, and you trickle seawater over that so that wind blows through, it picks up a lot of moisture and is cooled in the process. So inside it's cool and humid, which means the plants need less water to grow. And then at the back of the greenhouse, it condenses a lot of that humidity as freshwater in a process that is effectively identical to the beetle. And what they found with the first Seawater Greenhouse that was built was it was producing slightly more freshwater than it needed for the plants inside. So they just started spreading this on the land around, and the combination of that and the elevated humidity had quite a dramatic effect on the local area.

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