Category: Environment

• Best new tall building of 2023

  

  The Quay Quarter Tower in Sydney has been just been awarded the “best new tall building” of 2023 by the Council on Tall Buildings and Urban Habitat (CTBUH). Deigned by 3XN and BVN, it’s a great adaptive reuse story.

  The project is a renovation and expansion of an existing 1970s building. And the team managed to retain 65% of the original structure (slabs, columns, and beams) and 95% of the original core.

  This results, according to their calculation, in 12,000 tons of embodied carbon savings. The equivalent of 35,000 flights between Sydney and Melbourne. At the same time, the team managed to add 45,000 m2 of new floor area to the site by grafting new slabs onto the existing ones.

  But let’s get back to these carbon savings.

  According to this site, there are 37 direct fights between Sydney and Melbourne each day. That’s about 13,505 flights per year, meaning that the carbon savings from not fully demolishing this building (and starting fresh) are equal to about 2.6 years of people not flying back and forth between these two cities.

  If you consider how long buildings typically last (this one was relatively young at under 50 years), it kind of makes buildings seem less bad. Of course, we’re only talking about and comparing embodied carbon. There’s also the ongoing operation of the building.

  In any event, a deserving project. Congrats to the team. For more on the project, click here.

  Photo via Dezeen

  2023.10.31

• Comparing innovative technologies

  

  This is an interesting chart from Bloomberg Green comparing some of today’s innovations against innovations of the past. At the top of today’s innovations are EV batteries, which from 2010-2020, saw annual deployment growth similar to that of US WWII aircrafts. However, when it comes to reducing costs, both EV batteries and solar PV modules come out on top with annual declines approaching almost 20%.

  Of course, these probably aren’t perfect comparisons. If you look at EV batteries and solar PV modules from 2020 to 2023, their growth rates jump to 72% and 39%, respectively. So who knows if these are the right time slices to be using in order to accurately capture the “key expansion periods.” Regardless, it does provide some historical context and it does say something. These are important innovations.

  2023.10.05

• How wide should a bike lane be?

  The Dutch now believe that the number is 230cm. This is an increase from a previous recommendation of 200cm. The thinking behind this number is roughly as follows. Apparently there are Dutch laws stipulating that bikes can’t be wider than 75cm. So this is the starting point.

  But since it’s impossible to always ride in a perfectly straight line, there seems to be a generally accepted rule that, at an absolute minimum, cyclists need about 100cm of width to themselves.

  If you now double this so that two people can ride side-by-side, you’re at 200cm. This is an important design criteria because the Dutch also seem to believe that (1) cycling is a social activity and (2) a child should be able to ride beside their parent. (Love this!)

  Finally, add in a bit of buffer so there’s room to pass slower cyclists and/or nobody feels like they’re going to crash into oncoming cyclists, and you get to 230cm as the ideal width of a single bike lane.

  I’m not sure I had given this much thought before, so I look forward to scrutinizing (and possibly measuring) every bike lane I ride in going forward.

  2023.09.11

• Gardens that filter highway runoff

  

  Toronto’s elevated Gardiner Expressway is a topic that pops up periodically on this blog. We have talked about taking down a portion, realigning a portion, adding a congestion charge, lighting it like they have done in Shanghai, and of course we have talked about the good work that The Bentway team is doing.

  Their most recent project is something called Standing Grounds. It’s a collaboration with New York-based Tei Carpenter (Agency–Agency, NYC) and Toronto-based architect Reza Nik (SHEEEP, Toronto), and I think it’s really clever.

  If you look closely at the underside of the Gardiner Expressway, you’ll see that there are existing downspouts in place that take rainwater, snowmelt, and whatever else from the highway above, down to the ground. What Standing Grounds is going to do (by next month) is take this existing infrastructure and add natural filtration chambers that can remediate this excess water.

  I learned today that plants like milkweed, agastache, and yarrow are actually able to absorb road salts and heavy metals like lead, cadmium, and hydrocarbons. So instead of this dirty water flowing from the highway and into the ground, it will soon be filtered by a seemingly simple garden system that looks like this:

  

  This is an obviously positive thing for the city and I love that it is leveraging infrastructure that already exists. As I said: really clever.

  Renderings: SHEEEP

  2023.08.10

• Any wear, anywhere

  Yeah, I can’t say I’m excited to try this. Japan Airlines has just launched a new year-long pilot allowing its passengers to reserve and rent clothes. The way it works is that you tell them what you’re traveling for and then you get something like a “spring/fall x smart casual” variety pack delivered to your hotel or Airbnb.

  The clothes, which look something like this, are a mix of excess stock and second-hand stuff, and so it is being positioned as a more sustainable choice. You’re both using clothes that might otherwise go to waste and you’re reducing the amount of weight that you’re traveling with. (You still need to bring your own underwear.)

  And this could add up:

  The site handling the clothing rental system claims that a 10kg reduction in a flight passenger’s luggage results in an estimated 7.5kg reduction in carbon dioxide emissions. A 7.5kg reduction in CO₂ emissions, it adds for reference, is the equivalent of forgoing using a hairdryer for 78 days (based on an average use of 10 mins per drying session).

  I suppose this could also be positioned as a convenience: why lug a suitcase full of clothes around when you can just reserve what you want and have it waiting for you at your hotel? But I also suppose that you need to be okay wearing well-used clothes. Maybe this matters less, though, if the clothes are really nice and fashionable?

  I don’t know. It’ll be interesting to see if there’s a market for this.

  I would also say that even though I may not be excited about rental clothes, I take great pride in packing efficiently for travel. Unless I’m going snowboarding, I basically do not check a bag. I can do 2 weeks just fine with a carry-on and, to be honest, there’s something liberating about reducing your belongings to only what is necessary.

  So who knows, maybe bringing only underwear and toiletries would be even more liberating.

  2023.07.05

• Self-driving cars, plugs, and electrical grids

  This is going to be old news to many of you, but this past week I experienced Tesla’s self-driving capabilities for the first time. And I must say that I was very impressed. It did everything from navigate stop-and-go city traffic to navigate lane changes on the highway. Overall, it makes my five-year old car feel pretty quaint. The software is that much more sophisticated and one has to assume that all of this autonomy stuff will only get significantly better as LIDAR becomes common place in production vehicles.

  In other car news, North America appears to be narrowing in on an EV charging plug standard. It is Tesla’s plug, but it is now appropriately called the North American Charging Standard (NACS) plug. And last week, Electrify America — which is the largest non-Tesla, fast-charging network in the US — announced that it would be adding the plug to its network. The company also happens to be owned by Volkswagen. So big and important companies seem to be coalescing around this plug type.

  Lastly for today, here’s a post by Fred Wilson talking about (1) bi-directional EV charging, (2) the apartment buildings he and his wife are developing, and (3) our ongoing transformation away from a centralized electrical grid to a decentralized one. What he talks about in his post is something that we are actually piloting in a few of Slate’s office buildings right now. It’s still early days, but I think it’s really exciting. Tech seems to be enabling a broader shift toward decentralization. And in the case of our electrical grid, it’s going to lead to a more resilient one.

  2023.07.03

• Which is more “sustainable”?

  These two residential buildings:

  

  Or this one here?

  

  Both are located in the Porto Nuova district of Milan.

  And from what I could tell when I walked by them yesterday, they’re pretty comparable. They have similarly deep balconies. And they even appear to have the exact same exterior cladding.

  Of course, the big difference is that the former — the celebrated Bosco Verticale — has about 800 trees, 4,500 shrubs, and 15,000 plants sitting on its 3.3m cantilevered balcony slabs. It also has an elaborate irrigation system that services said greenery.

  Okay, so which is more “sustainable”?

  First impressions would suggest that it’s the former. Trees and green things are good for the environment. So putting trees on a tall residential building must also be good, right? Maybe.

  The main counterargument is that it requires a lot of additional work to get trees, shrubs, and plants onto a tall building. You need more concrete, more structural reinforcing, an irrigation system (maybe not always?), and a way to maintain everything going forward.

  In this case, all of the greenery is a common element, and so it’s maintained by the building and not by any of the individual residents. Among other things, this preserves a uniform aesthetic.

  But all of these additional materials increase the building’s embodied carbon. And so there’s an important question to consider: Do the benefits of putting trees up in the sky outweigh the impacts of actually doing it?

  This is one of the great debates surrounding this project, and it’s a good reminder that being more sustainable isn’t so simple. There’s a lot to balance, and there are countless details to figure out.

  However, innovation does require iteration. And already there are new iterations of the Bosco Verticale, such as this one in Paris, that plan to swap concrete for mass timber construction.

  So even more trees in the sky. That’s probably a good thing.

  2023.05.24

• Harnessing air conditioning condensate

  We spent yesterday and today at the Venice Biennale (both the Giardini and the Arsenale). I really enjoyed it and I’m glad that I was finally able to attend. One of my favorite exhibits was Bahrain’s. It is called “Sweating Assets”, and it’s a demonstration of how air conditioning condensate might be harnessed from the country’s significant cooling infrastructure.

  Here’s a video of it in action:

  In the middle of the exhibit is a big glass box. This is meant to represent a ubiquitous conditioned space. And as the humid Venice air hits this glass box, condensation is created. This water is then channeled to various soil deposits, where greenery is already starting to grow. And presumably it will continue to grow over the life of the exhibit.

  They were careful not to come across as encouraging excessive air conditioning. This was not the point. Instead, the message was: Air conditioning is already an omnipresent necessity in the country, and here is how something that is mostly ignored today — AC condensate — could be turned into a meaningful asset.

  I thought it was clever. And they also gave out a nice book for free.

  2023.05.21

• Yes, I want a pair of these 3D-printed shoes

  3D printing, or additive manufacturing, is often referred to as the next industrial revolution. And we are certainly seeing it creep into the mainstream economy in meaningful ways. You can soon buy a 3D-printed home for under $99,000, and already you can buy a home in the world’s largest 3D-printed community. We also now make bridges using additive manufacturing, which in this case in Amsterdam, was prefabricated off site and craned in.

  Many of the architects we work with also use 3D-printed models to rapidly prototype, which I am guessing is disruptive to the whole unpaid architectural intern thing. But what has been missing, for me at least, is a comfortable pair of 3D-printed shoes from the future. Thankfully, Denmark-based RAINS (in collaboration with Zellerfeld) announced their first 3D-printed pair at Paris Fashion Week earlier in the year.

  And now they’re available for order:

  

  Maybe you like the look of these, or maybe you don’t. I would definitely wear them. But what’s interesting is that they’re 100% recyclable; they’re printed upon order (so no excess supply); and they’re made using a fully automated production process — meaning there’s little to no labor component and there’s no overseas factory. This sounds like something!

  I mean, presumably this completely changes where shoes want to be made. Previously you wanted an overseas factory where labor was cheapest. But if labor is no longer a meaningful input, do you now just want to produce these things closer to where your customers actually live and reduce shipping costs? From what I have read, Zellerfeld’s factory is in Hamburg and it currently takes something like 40 hours to print one pair of shoes.

  Decentralization was always one of the great promises of 3D printing. And to be honest, it’s not hard to imagine a world where you walk into a store, have your feet scanned for optimal sizing (already the company lets you do this online with your phone’s front camera), and then you get a new pair of shoes printed for you right on the spot. Maybe you even get to play with the design a little so that no two shoes are ever exactly the same.

  Of course, along with this, you’d also get an NFT version of your shoes indicating where you printed/minted them. This would be your decentralized blockchain record for your decentralized physical shoes. This sounds weird and consumers won’t necessarily think of it in this way, but it’ll be what’s happening behind the scenes. What consumers will care about is being able to flex their new shoes both offline and online.

  On that note, let’s get back to the basics here: Would you ever order/wear these shoes?

  2023.05.07

• Buildings are carbon icebergs

  

  Kelly Alvarez Doran shared this article with me on Twitter earlier today. It talks about some of the work that his design studios are doing at the University of Toronto around embodied carbon. More specifically though, his studios are being tasked with figuring out how to halve the carbon emissions generated by new buildings during this decade.

  And one of the big findings from his studio is exactly the title of this post: our buildings have become carbon icebergs. Here in Toronto, we tend to build a lot of below-grade parking. We recently got rid of parking minimums (which obviously needed to happen), but the market still demands it in certain areas and for certain projects. So we continue to build it.

  What the above section drawings are showing is the percentage of carbon emissions resulting from the below-grade construction component in each project. And as you can see, the numbers are significant, particularly in the case of smaller mid-rise buildings where you don’t have a lot of above-grade area to grow the denominator.

  Looking at 2803 Dundas Street West, which is just down the street from our Junction House project, the number is 50%! And sadly, I would guess that our project is probably only marginally better; we’re a bit taller up top, but we also have a raft slab foundation and a watertight below-grade.

  This is one of the reasons why I recently tried to make the case for above-grade parking. A big part of my argument was that if we want parking that can be adapted to other uses in the future, and if we want to reduce the embodied carbon in our buildings, then we should be building “unwrapped” above-grade parking. That is, parking which isn’t hidden behind other uses.

  But this is often frowned upon in planning circles and it’s not going to be feasible in smaller mid-rise buildings like the ones shown here. We’re also just talking about what is less bad. What we really ought to be doing is trying to build our cities so that people don’t need to rely so heavily on cars to get around.

  Image: Ha/f Studio

  2023.04.14