The Freakonomics of Sustainable Energy: A Book That Should Be Compulsory Reading

Without the Hot Air

David MacKay's "Sustainable Energy – without the hot air" uses arithmetic, not adjectives, to assess renewables. The book covers cars, wind, solar, heating, and more, then offers five energy plans for Britain and plans for Europe, America, and the world. Praised by The Economist, Science, and The Guardian, it is available free online and in print.

For anyone with influence on energy policy, whether in government, business or a campaign group, this book should be compulsory reading.
  1. _aavaa_

    The books is good(ish) for it's time, but some of its analysis and forecasts are fundamentally flawed since it falls for the primary energy fallacy by comparing the chemical potential energy (in J) directly to electrical energy (also in J). The two are fundamentally different things and called be compared 1:1. E.g. To heat up your home with natural gas you need ~1J of chemical energy to get 1J of heat into the home, but with a electric heat pump you only need 1/6 J to get 1J of heat.

    It is also a product of its time in terms of wind/solar vs nuclear. His forecasts of the impact of solar and wind is based on prices and performance from 2008. Prices have come down an order of magnitude since then, and performance and lifespan have increased drastically.

  2. sideshowb

    The updated version of this book is available in game format with the blessing of UK government https://my2050.energysecurity.gov.uk/?levers=111111111111111

    Risking the HN hug of death here, but my own prototype of a car miles model inspired by the David's approach can be found at https://trafred.cardiff.ac.uk/

  3. zbs1970

    Not commenting on the physics of this; I want to point out that I thought the narrative structure of this book was amazing. I have not read a hard-core piece of analysis in any field before or since that I thought was a page-turner the way this was. When I read it in 2008 I remember completing each chapter and feeling like "we're screwed" and then the next chapter feeling like "ok, we're going to make it." Presenting such analysis in the form of a race between supply and demand was narrative genius and I think should serve as an example of how ideas can be presented in a way that is both exciting and not-dumbed-down.

  4. sam1r

    The original author was blogging just a couple days prior to his death. Rest in peace

    https://itila.blogspot.com/2015/09/what-do-you-tell-children...

  5. nirinor

    Actually, the better link might have been <https://withouthotair.org/changes>.

    Note the .com->.org: its a version of the book whose numbers are maintained here <https://github.com/life-itself/without-hot-air/commits/main/>.

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2026-09-29