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Building Matters

Climate Action: Living the 1.5 Degree Lifestyle

A review of Lloyd Alter's book—a deeply researched look at what it takes to live an ultra-low-carbon lifestyle

Limiting global temperature rise to 1.5° C will require a lot of change, in how we live, eat, and move

Lloyd Alter, architect and prolific blogger at Treehugger, has a new book. Titled Living the 1.5 Degree Lifestyle, the book is an exploration of what it takes to live within a pretty strict carbon budget. That means tracking the carbon emissions impact of everything he does: what he eats, how he travels, what he wears, the electronic devices he buys, and more.

But it was his subtitle that really grabbed my attention: Why Individual Climate Action Matters More Than Ever. For the past few years, I’ve been with the crowd that believes individual action can’t solve this problem. Without big shifts in new technology and government policy, individual action seems to be ineffective. So, I began reading, hoping that Alter would win me over.

I’m going to cover some of the important points in the book, but you’ll need to get a copy and read it yourself if you want to understand all that he has to say, which is a considerable amount, especially for a brief 142 pages.

The premise

Whether you believe it or not, you know the story line by now. The Industrial Revolution began an unintentional experiment to see if we humans could change the climate on Earth. Before the Industrial Revolution, the average atmospheric carbon dioxide (CO2) level was 280 parts per million (ppm). Two centuries later, it was up to 319 ppm when I was born. Yesterday, the CO2 level at Mauna Loa was 416 ppm, 49% higher than it was in 1750 and 30% higher just in my lifetime.

And, as Svante Arrhenius predicted in the 19th century, the Earth is warming. There’s tons of evidence that increasing the concentration of CO2 in the atmosphere raises the global average temperature. We know we need to do to reduce the emissions of carbon dioxide and other greenhouse gases, collectively referred to as CO2e (the e stands for equivalent). The 2015 Paris Accord is where the 1.5 degree number came from, as the participating nations agreed to keep the global temperature from rising more than 1.5° C above what it was at the dawn of the Industrial Revolution.

That limit to temperature increase correlates with specific targets for carbon emissions. The goal is to get total carbon dioxide emissions down to 2.5 tonnes (1000 kilograms) per year per person by 2030 and down to 1 tonne per year per person by 2050. Alter chose the easier 2030 target for his experiment in living the 1.5 degree lifestyle. That put him on a diet of about 7 kg of CO2e per day. To track his personal CO2e emissions, he created a spreadsheet and recorded everything with a carbon impact.

Two kinds of carbon emissions

But first, we can’t jump into carbon tracking without distinguishing between the two kinds of carbon emissions.

Operational carbon emissions – the greenhouse gases (CO2e) emitted as the result of operating a building, vehicle, or device.

Embodied carbon emissions – the CO2e emitted as a result of making those buildings, vehicles, or devices.

When you burn fuel for heat at your house, for example, the exhaust gases put CO2 into the air right there. The electricity you use is usually generated somewhere else, but it still results in greenhouse gas emissions. Those are both operational carbon. Embodied carbon emissions are the greenhouse gases emitted during the mining, transport, and manufacturing of all the stuff that goes into your house: building materials, furniture, food . . . everything. Because of the structure of our economy, almost everything we do has a carbon impact—operational and embodied.

The embodied carbon problem

But there’s a problem with the term “embodied carbon emissions.” Often, the word “emissions” is left off. Do a search and you’ll see few instances of the full three-word term. Everyone wants to talk about embodied carbon. And because a lot of people don’t know much about it, they assume embodied carbon is a good thing.

Last week, I posted a poll on LinkedIn and Twitter asking what people thought embodied carbon means. Here are the LinkedIn results:

Confusion about mbodied carbon is obvious in the results of this (unscientific) poll
Confusion about embodied carbon is obvious in the results of this (unscientific) poll

At 42% and 58%, the Twitter results weren’t much better. Clearly, a lot of people seem to believe embodied carbon is good because it’s carbon tied up here on the ground instead of trapping heat in the atmosphere. Maybe they’re confusing it with sequestered carbon.

Also, the full three-word term contradicts itself. Is the carbon embodied? Or is it emitted? It’s hard to imagine it could be both.

I mention this here because Alter has come up with a much better term: upfront carbon emissions. It would be hard to think that’s a good thing. He’s gotten some traction with adoption of the term already, and I think everyone should start using it and drop the confusing “embodied carbon” immediately.

A few tidbits

Alter’s book is packed with great information and pithy quotes. Here are a few of the things I found notable, some of which were new to me.

Carbon emissions shown as Scope 1, Scope 2, or Scope 3 [Credit: US EPA]
Carbon emissions shown as Scope 1, Scope 2, or Scope 3 [Credit: US EPA. Click to go to their page.]
  • Carbon emissions are counted in one of three categories: Scope 1, Scope 2, and Scope 3, as shown in the EPA diagram above. When companies claim they’re carbon neutral, ask if they’re including Scope 3 emissions.
  • Energy and money are the same thing. This comes from Vaclav Smil, the great writer of weighty tomes on energy whom I learned about in 2005 in my peak oil days. It means simply that having more money gives you the power to control more energy.
  • Alter believes the Jevons Paradox is real. I found this comforting because some people in this field don’t believe it. Also known as the rebound effect, this paradox says that efficiency gains lead to greater consumption. Read more about it on the Interwebs or in Alter’s book.
  • In discussing the CO2e of food, Alter goes into detail about the “cold chain,” which is the system of refrigerated transportation that uses a lot of energy.
  • Net-zero energy is not the same thing as net-zero carbon. Right now, carbon—especially upfront carbon—is more important.
  • The “15-minute city” is a name for being able to walk or bike within 15 minutes to most of the things you do. It makes living the 1.5 degree lifestyle easier, and Alter lives in such a community himself.
  • E-bikes are the next big thing.
  • Alter talked about being a cottager in the summer and buying Norwegian wood in a bag . . . and missed the opportunity to make a Beatles joke.
  • A paraphrase of something from Robert Ayres: “The purpose of the economy is to turn energy into stuff.”
  • Beer Can Appreciation Day is a fake holiday. “I yell at my own kids about buying beer in cans,” Alter wrote, lamenting the loss of returnable bottles and the increased carbon emissions of disposable containers.
  • Operational emissions dominate in housing and cars, but upfront carbon is the biggie with electronic devices.
  • “There is a giant pile of carbon behind every minute of our screen time.” The Internet and the entertainment industries are huge emitters.

My take

Chapter 4 is the most important chapter in Living the 1.5 Degree Lifestyle. It’s titled “Energy, Efficiency, and Sufficiency,” and he gets into some deep discussions of energy, the economy, and growth. That’s where he quotes Vaclav Smil and brings up a book about something called “degrowth.” It’s the stuff we really need to grapple with as we navigate the climate crisis. I was hoping he would mention the work of physicist Albert Bartlett, which would have fit in well here, but he didn’t.

Alter’s diligence in researching the CO2e associated with all his activities is impressive. He shows parts of his spreadsheet throughout the book and discusses where he succeeded, where he failed, the lessons he learned, and the things that surprised him. He’s done a great service by digging into this.

So, did Alter win me over? Do I now believe that individual action matters more than ever? Here’s my problem with this claim: It just seems to me that if it’s going to take a concerted effort by a significant portion of the population to avert climate catastrophe, we’re already screwed. I can’t see it happening.

I know that sounds like what Michael Mann calls “doomism.” But while reading the book on the plane to Seattle (hmmmm), I looked at what the people around me were doing in airports, restaurants, and stores. I don’t see an appetite for this kind of change. Also, because we can’t even have a real debate about climate change in the U.S., many people here aren’t even aware of the problem, much less the kinds of solutions that Alter discusses.

But here’s what happened. After reading the book, I found that my thinking had changed. My MacBook Pro, for example, is six years old now, and I’d been thinking of getting a new one next year. Now I’m thinking I’ll try to squeeze as much life out of it as I can before replacing it; maybe even just replace the battery, which has a cycle count of 1996 right now and is giving me the “Service Recommended” warning. And that kind of thinking has spread to a lot of my decisions.

Living the 1.5 Degree Lifestyle is an important book. It’s well documented, easy to read, and full of great information. Alter has really done his homework, literally! I recommend it highly.


Living the 1.5 Degree Lifestyle, by Lloyd Alter


Allison A. Bailes III, PhD is a speaker, writer, building science consultant, and the founder of Energy Vanguard in Decatur, Georgia. He has a doctorate in physics and writes the Energy Vanguard Blog. He is also writing a book on building science. You can follow him on Twitter at @EnergyVanguard.


  1. Nick Defabrizio | | #1

    Great article! Thanks for suggesting this book. Those of us actively trying to reduce our operating carbon footprint can't ignore the rest...I hope to get it and read it soon.

    I am lucky and can afford to spend money working hard toward full electric (it is also enjoyable). But to do that and maintain a middle class semi rural life, I fear that the amount of up front carbon emissions will be high. And then, even with all of these changes, my operational carbon emissions will be far higher than they were when I was living in a walk up in NYC and taking the subway. But we will keep working toward this goal.

    On a societal level, however, so much of the US economy revolves around high levels of consumption of low quality, "stuff"...... and the stuff is typically now made in third world countries or China and shipped to us in a cycle that facilitates huge expenditures of carbon. As we see with the recent "supply chain" issues and inflation, our economy is now so tightly leveraged that even small changes to this system bring about massive complaints and push back. I think you are absolutely right that Americans right now have very little tolerance or patience for sacrifice and inconvenience. The collective response of many to COVID (not including our valiant health care workers and many who work in essential jobs) highlights this quite well.

    Politically the GOP has determined (probably correctly) that at least for the next two election cycles, a majority of the public is in no mood to make sacrifices for a low carbon future and will punish at the polls those politicians (including the current Administration) pushing for more aggressive measures. Meanwhile, those who do support more aggressive measures are struggling to tie climate issues to the gigantic costs of natural disasters that now seem endemic in every part of the US. The media harps on it but there is very little in the way of response that would suggest that most people caught in these events are changing lifestyles or policies to address a future with more of these events.

    Thus, in the near term, I am not confident.......However, longer term, I am hopeful for two reasons: (1) technology keeps advancing and (2) so many young people are far more ready to change. As they take the reigns, they will have ever rising power over political and cultural decisions and my generation's influence (which has been terrible in my opinion) will start to fade.

    1. GBA Editor
      Kiley Jacques | | #2

      "So many young people are far more ready to change."--Amen

      1. Nick Defabrizio | | #3

        It sort of reminds me of when I am out walking: I walk slowly-like an old guy...When young people come up behind me, for a brief moment they hesitate and politely walk behind me for a bit. Then when the opportunity arises, they take the chance and scoot past and around me! :)

        1. GBA Editor
          Kiley Jacques | | #4

          Ahhh, age. Ain't it the way?

  2. Brian Carter | | #5

    You can tell just from the number of comments how hot this topic is, but thanks, Allison, for a chance to see it mentioned.
    At least 30 years ago there was a book titled "Simple in Means, Rich in Ends" that also made the direct connection between lifestyle and sustainability. Decades before that was "Small is Beautiful". Perhaps .05 percent of Americans ever read these. Now, of course, we have all the time we need to make up for that.

    Sorry, I'll file this under 'Unanswered Prayers"

  3. James Someone | | #6

    I don't need a book to guide me toward living a simple life. I would also encourage those that would like to read it, to consider sharing the book instead of purchasing multiple copies.

    I agree with Mr. Bailes "take" on the topic, individual efforts won't do much to curb the degradation of our planet. Nor is it useful preaching to a choir who's not paying attention. Its good to try though.

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