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Solved, How the World's Greatest Cities are solving the climate crisis

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If our planet is going to survive the climate crisis, we need to act rapidly. We cannot wait for national governments to agree on how to reduce greenhouse gas emissions and keep the average temperature rise to within 1.5 degrees. In Solved, David Miller argues that cities are taking action on climate change because they can - and because they must. He makes a clear-eyed and compelling case that, if replicated at pace and scale, the actions of leading global cities point the way to creating a more sustainable planet.

Solved: How the World's Great Cities Are Fixing the Climate Crisis demonstrates that initiatives in cities such as Los Angeles, New York, Toronto, Oslo, Shenzhen, Melbourne, and beyond can make a significant difference in reducing global emissions if implemented worldwide. By chronicling the stories of how cities have taken action into their own hands to meet and exceed emissions targets laid out in the Paris Agreement, Miller empowers readers to fix the climate crisis. As much a "how to" guide for policymakers as a work for concerned citizens, Solved aims to inspire hope through its clear and factual analysis of what can be done - now, today - to mitigate our harmful emissions and pave the way to a 1.5-degree world.

185 pages, Hardcover

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David Miller

1,042 books52 followers
Librarian Note: There are more than one author in the Goodreads database with this name.

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5 stars
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Displaying 1 - 30 of 30 reviews
Profile Image for Daniel Clausen.
Author 10 books540 followers
December 16, 2022
What does it mean to "think like a city"? When it comes to climate change and other global problems, it helps to understand how municipal politicians are thinking, planning, and acting on vital global issues such as climate change.

David Miller’s "Solved" is a recent book that examines the actions of cities to mitigate the greenhouse gasses responsible for climate change. He does so by drawing on the lessons of cities in the C40 Climate Leadership Group, a network of 97 cities committed to fixing the current climate crisis. Miller argues that because cities are responsible for a great deal of emissions, they are also ideally placed to eliminate those emissions through prudent policies in energy, housing, transportation, and waste. In many cases, solutions in one city can be applied to other cities. However, even in situations where one size doesn’t fit all, cities can still learn from one another.

For me, the highlights of the book were the specific examples drawn from cities around the world, including those in the developing world. These examples help to demonstrate just how realistic solutions using modern technology can be.

The only word of caution I would say with this book is that the audience for it might be quite small. The ideal audience would be a city planner who is not yet familiar with the C40 Climate Leadership Group and best practices related to combating climate change. Other likely audiences are scholars of urban policy and activists.

For true beginners on the topic, a book such as "Climate Change: What Everyone Needs to Know" or "Climate Change: A Very Short Introduction" might be more appropriate.
Profile Image for Andrew.
680 reviews248 followers
April 10, 2021
Solved: How the World's Great Cities Are Fixing the Climate Crisis, by David Miller, is a book that examines some of the world's cities and how they are tackling climate change issues. Cities are where most of us interact with life and government on the ground, and thus play an outsized role in both emissions and how we interact with the environment. Our buildings and transportation systems are what generate a large portion of emissions in most, if not all countries. How we move, work and live is vital to both our ability to survive in the modern world, and our impact on the world through climate change. David Miller has written an interesting book that examines how cities around the world are attempting to mitigate climate change. As the former mayor of Toronto, Canada, Miller has a unique perspective both on the governance side of city planning, and the everyday issues cities face when attempting to create and implement climate policies. The cities examined in this book span the globe, from Vancouver and Toronto, to New York and Los Angeles, Rio de Janeiro, Caracas, Cape Town, Addis Ababa, Shenzhen and Tokyo, and many more; the climate policies of each city in various circumstances is examined, with novel ideas, concepts and plans being examined at a high level.

Some interesting chapters are present; planning, retrofitting buildings, energy grids, building new buildings, managing waste, public transport and so forth are all examined. Some novel systems are discussed - Toronto's Deep Lake Water Cooling System, Shenzhen's fleet of electric public buses, Toyo's cap and trade energy retrofitting policy, energy efficiency retrofits on the Empire State Building in New York, and so forth. These systems are examined by Miller with an eye for achievability; challenges exist on all fronts, but Miller argues that governments need to both partner with and push forward private enterprise to ensure they keep up with necessary changes that will keep humanity within the 1.5 degrees Celsius range of temperature increase.

This was a very interesting book about climate change policy and planning at a municipal level. It is a good read for both a Canadian and global perspective on climate change and some novel and important contributions at an local level. Easy recommendation for those looking for a good read with a positive tone, on climate change. No more naysayers -who needs convincing? Let's get cracking!
Profile Image for Jesse Ward-Bond.
135 reviews3 followers
April 16, 2023
3.5 Stars

The author makes a great case for how cities can pick up the slack where federal governments are failing. The frequent optimistic case studies presented were certainly inspiring, and it was great to learn more in particular about what the developing world is doing to manage climate change and to mitigate growing levels of inequality.

My main gripe with this book was that it is a little too optimisitic about the magnitude of the problem the world faces. For instance: calling the book "solved" when the problem is so, so, far from being solved. Clearly some cities have made very real progress fighting some very specific aspects of climate change, however this book ignores a key challenge that cities face: managing consumption atterns. Outside of the final chapter (on municipal waste management) nothing really addressed what the fundamental root of so many of the problems that are "solved".. We live in a world where status and development are determined mostly by how much you consume, all these solutions are moot if they just enable people to get more, cheaper, faster.

Additionally, the section on how building retrofits can benefit the environment and spur the economy by allowing landlords to charge more for rent, left a poor taste in my mouth.

My life has tacked hard towards de-growth and post-growth approaches to climate change, which this book is decidedly lacking (except for the last chapter, which had some creative techniques for minimizing municipal waste). I'm interesting in seeing if I will feel any different about this book in a few months.

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I had to read this a second time for a course I TA. Lo and behold, climate change remains unsolved.
Profile Image for Kate -MontglaneChess.
55 reviews2 followers
January 17, 2021
Very excellent read. The only missed opportunity was at the very end, with a couple of paragraphs talking about what individuals can do to help go 'green'.

The author does a strange about-face and spouts several common personal-responsibility level talking points (eat less meat, recycle more, walk more) which seemed really weird after discussing how like 80%+ of greenhouse problems are caused by big industry and municipal choices. He does mention to "vote for people with good policies", which is fantastic. But I think the missed opportunity was to double-down on the market trends aspects he discussed earlier and recommend "voting with your pocketbook" as well-- choosing, if possible, greener/more efficient homes, apartment buildings, cars, and consumables.
Profile Image for Kristen Oleynik.
6 reviews
May 27, 2021
I loved this book! The importance and ability of cities to address climate change is significant. Living in a city that recognizes this has created a greater quality of life for my family and I. With lots of work left- I’m excited for the continuing progress to come!
Profile Image for Josh Medicoff.
55 reviews1 follower
March 16, 2022
Someone needs to tell “celebrity urbanists” to STOP writing shit like this
Profile Image for Robert Irish.
759 reviews17 followers
January 11, 2021
This book is important because it looks at how we can--and in small ways ARE--addressing climate change productively. The basic argument of the book is that cities are doing some very good things and that if every jurisdiction copied the best practices of other cities, we could stem climate change.
Miller argues that cities are more nimble than higher levels of government, and need to be more responsive to the demands of citizens. Leaving aside the dismissal of higher governments, he seems to idealize city governance. It works if you have a progressive mayor like Miller himself or Anne Hidalgo in Paris, but London's progress was delayed by Boorish Johnson, and Toronto has been slowed down by Rob Ford and John Tory. So, cities like other levels of government can be good or bad.
Regardless of that quibble, Miller does point to excellent examples in energy generation, buildings, transportation, and waste management--areas where cities can make a difference. I found particularly his examination of buildings was excellent because it shows what appropriate regulation and support can do--it creates jobs, it improves resilience, and it lowers greenhouse gases. Let's do it!
One thing I particularly liked about this book is it gives ammunition for those of us who wonder how to have a voice in this large challenge we call "climate change."
Profile Image for Amrita.
37 reviews5 followers
January 22, 2021
**I received a free ARC of this book thanks to Netgalley and the publisher in exchange for an honest review.
Solved is the kind of book we need to see more of - clear-gazed, factual accounts of what worked and how to plan better going forward in dealing with climate change. So much of the talk around the issue is based on global action and individual choices but there is a significant portion between climate treaties and using less toilet paper that needs to be addressed by local governments.
The problem is that I think of this book as one that is preaching to the choir. If you have an interest in local solutions to global problems that are affecting local lives, then this is a good read. The rather dry tone is what I expect from a politician and I didn't find it distracting or unpersuasive but it makes it unlikely that I recommend it to others unless they have an expressed interest in the subject, Which is a shame.
104 reviews
December 27, 2020
David Miller was formerly mayor of Toronto, from 2003-2010 and is a climate change leader. This is a small book which claims "How the World's Great Cities are fixing the climate crisis." He writes well, but the book is a series of unconnected articles. He differs from other writers on this topic by two great ideas-the local governments of major cities are better placed to have a major effect on climate than distant national governments, and mayor led city change can be done well voluntarily but is better done by compulsion (p10). He talks about transportation, energy use in buildings and waste. Major gaps are suburban development and the production of carbon dioxide in the manufacture of concrete. This book is worth reading but only just.
2 reviews
October 24, 2020
A book that gives us hope

David Miller has written and excellent survey of what cities around the world are doing to counteract climate change. At a time when many national politicians in the US deride and attempt to reverse environmental progress, Miller’s book is a beacon of hope that at least at the city level, innovative and imaginative policies are being implemented.
Profile Image for Debbie.
455 reviews16 followers
November 23, 2024
An important book that gives you hope and practical solutions in the face of climate change. I learnt a lot Mayors have more influence and impact on this topic than I had thought. Great strategies and examples from around the world. Let’s do it . Thank you to the author. Thank you to #netgalley and the publisher for an ARC.
Profile Image for Aiden Sweeny.
13 reviews3 followers
September 15, 2023
A must read if you are in anyway involved with city building. Outlines great solutions which will all be common place in the near future.
Profile Image for Kruti Munot.
40 reviews48 followers
July 18, 2021
Great examples of what cities around the world are doing and can do to tackle climate change. Committed leadership can change so much, and we don’t have to look to far to find solutions that work. The intention behind the book seemed to be to introduce and inspire, which it did.

If I could ask for more, I’d want to see more examples from the Global South. C40 cities (which the author held a leadership position in) works not only with the New Yorks and Tokyos of the world but also Nairobi, Mumbai, and others. I found this representation lacking (save for a couple of examples from Addis and Accra). Cities in the US and Europe have huge resources and enabling factors to get to the successes they have. Not to say they don’t have their own challenges, but in most of the rest of the world that simply isn’t the case. Cities in the global South - and especially secondary cities and local governments will have a huge role to play in tackling climate in the coming years. We simply cannot have a climate and local govt discussion without these cities in the centrestage.

I’d also have loved to read more about the political dynamics of effecting this change, how Mayors took ownership of these actions, and what it really took to make it happen. It definitely isn’t as easy as is portrayed - other cities around the world will have much to learn from how the big cities evolved and made it happen.

That being said, I don’t take away from the fact that the book is great for an introduction and inspiration. It’s a great, quick read and one that I’d recommend.
Profile Image for Cathy.
311 reviews17 followers
June 16, 2025
In "Solved: How the World's Great Cities Are Fixing the Climate Crisis," former Toronto Mayor David Miller shares real-world examples of how cities are stepping up to fight climate change.

Drawing on his work with the C40 Cities Climate Leadership Group, he highlights bold initiatives from cities such as Los Angeles, Oslo, and Shenzhen, emphasizing the role local governments can play in reducing greenhouse gas.

Solved offers a hopeful perspective on combating climate change through urban initiatives. Readers interested in environmental policy and urban planning will be intrigued, although he does get pretty far into the weeds. It’s worth wading through the technical details for the message. Meaningful change is possible, and cities are leading the charge.

He leaves the reader with recommendations that can make a difference, such as reducing the use of natural gas (the U.S. is the largest consumer by a wide margin), planning cities to be more pedestrian than car-centric, and lean more on green energy than fossil fuels (an uphill battle with powerful lobbies with deep pockets).

I received this advance reader copy of Solved from Aevo UTP and NetGalley in exchange for an honest review.
1,064 reviews11 followers
May 18, 2021
Five stars for the critically important content of this small book with a big message.
Big City mayors are tackling the climate challenge with workable solutions right now. What is needed is for more people to get on board the initiative with political pressure and practical know how and most importantly, not get in the way. While federal governments can provide important leadership it may come to little to late. This book tells you what has already happened to date, what mayors are working on and with and how things are already improving in small but significant ways.
I found this to be a relief to read in this gloomy second year of looming Covid-19 challenges. Co-operation has been essential in making health progress on the world stage.
Climate action can benefit from these lines of communication. Leadership and grass roots action both, can help rebuild our economies in equitable and green friendly ways.
Great things can be done.
Indeed they have already started.
346 reviews7 followers
July 3, 2024
A thought provoking book which gives you multiple data points to understand how big cities around the world are approaching vital questions of sustainability. David Miller takes exemplars from across the world (London, Schengen, Paris, Copenhagen, Austin etc) and details their Diverse initiatives to become net carbon neutral and reduce their emissions to get in line with the IPCC goals. He intentionally chooses cities as opposed to countries as his primary locii because cities are more prone to act than countries. Particularly enjoyed the chapters on green buildings (which Vancouver is taking a lead in), alternative sources of energy production (which Austin seems to be making great strides in) and new traffic solutions (which London and Paris seem to be serious about). Would love to read a similar book on Indian cities, given how India and China's energy use patterns will have significant global ramifications in the coming decades.
460 reviews4 followers
October 30, 2025
Solved is an inspiring and pragmatic roadmap for climate action rooted in real world success. David Miller transforms what could have been another abstract policy discussion into a vivid narrative of cities that are already rewriting humanity’s environmental future. From Toronto to Shenzhen, his analysis celebrates innovation, civic courage, and collaboration proving that local leadership can spark global change.

Miller’s clarity, optimism, and depth of understanding make this not just a manual for policymakers, but a source of empowerment for anyone who believes the climate crisis is solvable. Rather than despair, Solved offers direction and the conviction that transformation begins where people live, work, and lead together.
Profile Image for Patti.
361 reviews
April 27, 2021
I was expecting to learn about all sorts of innovative approaches to solving our climate crisis. Instead, many of strategies Miller highlights - renewable energy, sound building practices, mass transit, recycling - have been around for decades, with a few breakthroughs in technology over the years. Solved's core message is that cities now have the political will to use these strategies in a comprehensive way, and, as a result, these cities are taking the lead in inching humankind away from the brink of destruction. It's a bit of a dry read. Yet, it has a hopeful message.
Profile Image for Dafne.
36 reviews8 followers
May 6, 2021
I wanted to like this book more but it didn't have enough substance for me to rate it higher. It's more of a list of policies implemented by cities around the world, but there is very little detail or analysis. I certainly learned a few things from this book but everything I learned will require more research before I can actually put it to use. Overall I think it could have had more detail and been better organized, but it is nonetheless a useful anthology of actions taken by cities, and is a worthwhile reference book for any urbanists' shelf.
45 reviews1 follower
March 19, 2025
**This review is based on an e-ARC generously provided to me through Netgalley**

“Solved” by David Miller has an amazingly upbeat and positive attitude towards how many municipalities are working addressing climate change. Cities from around the world are showcased with the amazing, diverse work they are doing to help combat environmental issues. The writing was very approachable, and the message very upbeat. There is still a lot of work to do, but it is nice to take a moment and appreciate all the hard work that has already been done.
Profile Image for Peter Brickwood.
Author 6 books4 followers
January 10, 2022
Want an environmental project for your city. Here is a book full of ideas and encouragement. Wouldn't it be wonderful if cities could do so much to influence climate change that we would actually have a chance of becoming climate negative and keeping a habitable world for our grandchildren.

Also completed during the two and a half hours of 'stuff' accompanying sixty minutes of regulation time play in an NFL game.
Profile Image for Anastasia.
1,241 reviews24 followers
May 2, 2023
I started this as an audiobook and switched to a physical copy. Do not use the audio version.

For those of us who are frustrated with the governments of the world, this book is welcome. There are places that are succeeding in limiting greenhouse gases. There are cities to follow.

It is a book that you can recommend to your city councilors. It can be done and has been done. It can be done everywhere.
Profile Image for Holly Lockhart.
25 reviews
March 7, 2024
Very informative. Being 4 years after it was published I was able to look up how many of the targets that were set were doing... And it wasn't all bad! Obviously when the book was written, no one could have known the impact that covid would have globally, the chip shortage, the wars... All of which impact the climate crisis. I hope there will be an update as we approach the major deadline of 2030 and beyond.
2 reviews
December 24, 2020
It was really great to learn at a holistic level what cities across the world are doing to tackle climate change. It was interesting to obtain David Miller's perspective on the role of mayors and government in the face of climate change.

As an engineer though, I'm doubtful of using these best practices as a cookie cutter solution across the world as David suggests.
Profile Image for Andrew.
Author 2 books14 followers
January 5, 2025
Optimistic and informative overview of how cities are at the forefront of climate action. 70% of global emissions come from cities, and city action to lower emissions from electricity generation, transport, buildings and waste can deliver us what we most urgently need - action at scale over the next decade.
660 reviews10 followers
January 9, 2025
I'm probably giving it an extra star for the positivity, which is often in short supply in books on the climate, and particularly because the solutions and ideas presented in the book seem entirely feasible. We don't need wild technologies that don't exist yet to save us. The technology is out there; we only need leaders strong enough to adopt them.
Profile Image for Candace.
395 reviews
Want to read
October 23, 2020
Really loved this novel as it shows current solutions to help with climate change. This shows solutions are feasible and actually implemented and how politicians can implement and enforce them if willing.

Let’s get it done!
10 reviews
December 15, 2021
What it purports to be is a bit optimistic, but there's still a lot of interesting stuff presented concisely and well.
Profile Image for Lori Zuppinger.
Author 7 books4 followers
July 21, 2022
A great read. Some encouraging initiatives happening in cities - now if only they start picking them up in more places!
Profile Image for William.
36 reviews2 followers
October 22, 2024
Been reading and watching a lot on infrastructure lately! Written by a Toronto mayor not addicted to crack, it’s crazy how close yet so far away we are from building a sustainable future.
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