How To Avoid A Climate Disaster By Bill Gates [book review]

Part of the guide: MLM Reviews: The Honest Index

This is my honest How to Avoid a Climate Disaster book review, written by a guy who bought Bill Gates’ book knowing almost nothing about climate change and wanting to fix that gap in his head. I am not a scientist. I am a reader. So treat this as one curious person reporting what he found in the pages, what held up, and what I still do not buy.

Reviewed and updated June 2026.

I picked the book up for two ordinary reasons. First, I had been talking to my Dad about climate change and realized I could not hold my own in the conversation. I did not actually know much. Second, I was about to catch up with an old friend, Jonathan Budd, who runs Powur, a solar energy network marketing company doing hundreds of millions in annual sales. I hadn’t talked to him in a few years, and I figured reading a serious book on the subject would sync my head to his before we got on the phone.

So I read it. Here is what I took away.

In this guide

1. The two numbers the whole book turns on
2. What I actually learned
3. The argument against, and why Gates doesn’t fully answer it
4. The line I do agree with
5. The thing Gates does better than almost anyone: scale
6. On nuclear, which surprised me
7. What’s changed since the book came out
8. My verdict on this How to Avoid a Climate Disaster book review
9. The part of this that has nothing to do with climate

The two numbers the whole book turns on

Gates opens with a frame that stuck with me:

There are two numbers you need to know about climate change. The first is 51 billion. The other is zero. Fifty-one billion is how many tons of greenhouse gases the world typically adds to the atmosphere every year. Zero is what we need to aim for.

That is the spine of the book. We add roughly 51 billion tons a year, and to stop the warming we have to get that number to zero. Not lower. Zero. I had honestly never thought about the problem that way before, and once you do, the scale of it lands like a weight.

Here is my own position before I go further, because I am not going to pretend to certainty I do not have. I told a friend of mine, a best selling author, that I was reading this. He said flatly, “I think climate change is a scam.” We talked it through, and I told him something I actually believe:

One thing a lot of reading has done is show me that I just don’t know much about most things. So where I don’t know much, I try to keep my opinion observant and neutral until I do. I know the air stinks in big cities like New York, and it snows less in Alaska than it did when I was a kid. The stinky air is pollution. I’m not sure if that’s what’s cutting the snow.

He agreed with that. I still hold it. The science I have read so far is far better argued than the “it’s all a hoax” material, but I am not going to perform a confidence I have not earned with study. I would need to read another thirty or fifty books before I would call myself educated here. This one was a start.

What I actually learned

A few facts hit me harder than I expected.

One: about a billion people still do not have reliable access to electricity, and roughly half of them live in sub-Saharan Africa. Gates includes a photo of someone reading by candlelight at night. Most of us flip a switch without a thought. A large slice of the world cannot refrigerate food or light a room after dark. That single fact reframes the whole problem, because the honest answer is that those people should get more energy, not less.

Which is the trap. The world needs more energy so more people can thrive, and we are already dumping 51 billion tons of greenhouse gas into the air every year. Gates lands on three conclusions:

• To avoid a climate disaster, we have to get to zero.
• We have to deploy the tools we already have, like solar and wind, faster and smarter.
• And we have to create and roll out breakthrough technologies that take us the rest of the way.

Two: carbon sticks around. Gates writes that “something like one-fifth of the carbon dioxide emitted today will still be there in 10,000 years.” I did not know that. It changes how you think about “we’ll fix it later.” Some of it does not get fixed later.

Three: the mean temperature has risen about 1 degree Celsius since preindustrial times, and some regions have already passed 2 degrees. Gates warns that without cuts we are looking at 1.5 to 3 degrees by mid-century and 4 to 8 by 2100, and that even 2 degrees could wipe out coral reefs that feed more than a billion people.

Now, I am cautious about long-range prediction. Stock experts cannot tell you what the market does in five minutes, and the weather guy is often wrong about this afternoon. But I have also noticed that long-term trends get easier to call when you can quantify the drivers. And some human behaviors are dead easy to predict. If more of the world gets access to energy, they will use it. People will pick cheaper energy over cleaner energy almost every time. People will not stop building homes or eating the foods they like. That is not cynicism. That is just people doing what people do.

The argument against, and why Gates doesn’t fully answer it

I want to give the skeptics their strongest card, because the book mostly walks past it. The most serious objection I keep hearing is that the earth has cycled through hot and cold ages since it existed. During the Mesozoic era the planet ran 6 to 9 degrees Celsius warmer than today. The last ice age was about 5 degrees colder. So who is to say the planet won’t just swing on its own, regardless of what we do?

Gates touches the mechanics of past warming and cooling, but he does not really close that argument out. To me that is a real gap. I think the human contribution is likely significant. I also think a serious book should meet the best version of the other side head on, and this one does not quite do it. I am keeping my “observant and neutral until I study more” stance precisely because the loudest voices on both sides are selling certainty, and certainty is the cheapest thing in the room.

The line I do agree with

Here is the sentence from the book I would underline twice:

The only solution I could imagine was to make clean energy so cheap that every country would choose it over fossil fuels.

That is right, and it is right because it works with human nature instead of against it. You will not guilt 8 billion people into worse, pricier energy. You win when the clean option is also the cheap option, and people choose it for their wallet without ever thinking about the planet.

This is also where I used to argue with my brother Jonny Wood. We would be hiking a trail and he would say humanity needs to return to the rivers and forests, to live in nature. I would push back that if we returned to the forests we would just cut them down and build cities, and that the way out is architectural and engineering breakthroughs, not retreat. He would say we need to stop doing that and live simply. I would say that will not work with 8 billion people. Around and around we went. I still land where I landed on those hikes. The fix has to be systemic and built into better technology, or the mass of people will never adopt it fast enough to matter.

Recycling is my favorite proof of this. We have all been told since childhood to recycle, and most people still cannot be bothered. They buy groceries and the packaging goes in the trash. Some thoughtful folks sort their waste carefully, but not enough to move the needle of an entire planet. The only way you process the mountain of waste humanity makes daily is automated systems that run on their own, whether or not the average person understands or cares how they work. Robotics, AI, and well-built legislation do the job. Relying on billions of individuals to volunteer their way out of it has never worked, and it will not start now.

The thing Gates does better than almost anyone: scale

The real value of this book is watching how Gates thinks. He does not just see a big picture. He sees the problem at a scale most people physically cannot hold in their heads, and that is exactly why these problems feel unsolvable to regular folks. People cannot imagine how their one action touches a 51-billion-ton number.

He grounds it with stats that reset your sense of size. The world will be building “the equivalent of another New York City every month for the next 40 years.” And not every technology improves on the same curve. A computer chip today has roughly a million times more transistors than one from 1970. Cars and solar panels do not move like that. Gates points out that the Model T got 21 miles to the gallon in 1908, and the best hybrid today gets about 58. In more than a century, fuel economy improved by less than a factor of three. Atoms are stubborn in a way that silicon is not.

He also breaks emissions down in a way I found genuinely useful. Roughly 31% comes from making things (cement, steel, plastic), 27% from electricity, 19% from growing things (crops and livestock), 16% from getting around (cars and planes), and 7% from heating and cooling. Look at that and the scale of the task gets honest fast. If Tesla and Powur somehow took 100% of the market and made all electricity and transport clean, you would still only be touching about 43% of the problem, while civilization keeps expanding faster every year.

My friend Jonathan’s company is a good real-world gut check on this. As of when I first wrote this review, Powur reported helping remove 3,115,991,119 lbs of carbon dioxide. That sounds enormous. Do the arithmetic and it works out to 1,557,995 tons, or about 0.00305% of the annual problem. Helpful? Absolutely. He has genuinely moved the needle and he is on track to move it much more. It also shows you how vast the gap is between “a great company doing real good” and “solved.”

On nuclear, which surprised me

I came in vaguely anti-nuclear, the way a lot of people are, and the book moved me. Gates makes a one-sentence case:

It’s the only carbon-free energy source that can reliably deliver power day and night, through every season, almost anywhere on earth, that has been proven to work on a large scale.

The United States gets around 20% of its electricity from nuclear. France gets about 70%. Solar and wind together provide roughly 7% worldwide. Nuclear has real problems, but the book made me think it has to be part of any serious answer, especially since charging an electric car off a coal-fired grid just moves the smoke somewhere you cannot see it.

What’s changed since the book came out

The book published in 2021. Reading it again in 2026, two things stand out that the original could not have fully seen.

First, the AI boom rewrote the demand side. Data centers training and running large models have driven a surge in electricity demand that has utilities scrambling and, in some places, keeping fossil plants online longer than planned. The “more energy, everywhere” pressure Gates described did not just continue, it accelerated from a direction almost nobody in 2021 was modeling. That is the systems point again: solve one variable and another one you weren’t watching moves.

Second, Gates put his own money where the book is. His TerraPower venture broke ground in 2024 on a next-generation Natrium nuclear plant in Kemmerer, Wyoming, and his Breakthrough Energy fund keeps backing the kind of “we don’t have it yet” technologies the book begged for. Then, in a 2025 memo, Gates himself softened the doomsday framing, arguing that climate change will not end civilization and that we should measure progress by human health and prosperity, not by temperature targets alone. I found that interesting, and honestly closer to where I already stood. The goal is not a colder thermostat for its own sake. It is a world where more people thrive.

My verdict on this How to Avoid a Climate Disaster book review

Does the book hand humanity the solutions it needs? No, and Gates is honest that it does not. The breakthroughs we need are not all invented yet, and the political systems that would deploy them are fractured, slow, and often driven by feuds and personal agendas. What the book does well is outline the real challenges, at the real scale, in plain language, and it gives you thinking frameworks to carry the problem around in your head.

I liked one of his closing observations a lot:

People cut down trees not because people are evil; they do it when the incentives to cut down trees are stronger than the incentives to leave them alone.

That is the whole book in one line. The problems are not individual and they are rarely about malice. They are systemic, built out of incentives, and they have to be solved at the systems level. He even kills the comforting “just plant more trees” idea with math: offsetting one average American’s lifetime emissions would take around 50 acres of tropical trees, and doing it for the whole country would mean more than 16 billion acres, roughly half the landmass of the planet, maintained forever.

Bill Gates takes a lot of blowback online. Some people think he is a supervillain. Others think he is a sincere philanthropist working on problems most of us can’t grasp. From reading this book, I land in the second camp. The impression I get is of a person who genuinely cares about the future and is trying to do something useful with what he has.

Personally, I want my son to grow up with clean air and water in a world worth inheriting. Can we avert the worst of it in time? Yes. Will we? That is the honest open question. Our history says we tend not to act at real scale until the pain is already here. I hope I am wrong. I tend to believe in our ability to solve enormous problems when we actually decide to work together.

If you want to pick it up, here it is: How to Avoid a Climate Disaster on Amazon. I also recorded a video review on YouTube if you would rather watch than read.

The part of this that has nothing to do with climate

Here is what I keep circling back to, and it is bigger than any one book.

The difference between Gates and the average smart person is not raw IQ. It is the size of the system he can hold in his mind at once. He reads constantly, across fields, and he forces himself to think in inputs, incentives, and second-order effects instead of headlines and gut feelings. That is a built skill. Anyone reading at a high level can develop it. Almost nobody develops it alone, because alone you read one book, feel sharper for a week, and quietly slide back to how you thought before.

That is the whole reason I built a free community for people who want to grow on purpose instead of in fits and starts. People read widely, wrestle with hard ideas, and keep each other from drifting back to the old patterns. You can feel the difference between thinking about a big problem by yourself at midnight and thinking it through with people who push back and show up the next day. One fades by morning. The other compounds. If you want to become the kind of person who thinks at the scale these problems demand, that is where I would start, and it costs you nothing but a minute to join.

If you found this useful, here are the systems and tools I actually recommend, and if you’re new here, start here.

So what do you think? Is this book the map humanity needs, or just a good sketch of the terrain? I would genuinely like to read your take in the comments, and let me know if you pick up a copy.

Love,
David Wood

Related reading: The Billion Dollar Bullseye (Book Review), Christianity and Network Marketing, What Happened to Empower Network.