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Without Hot Air
Trends
- 1David MacKay's 'Sustainable Energy Without the Hot Air' back in focus▼Sustainable energy without the hot air (2008)
David MacKay's 2008 book 'Sustainable Energy Without the Hot Air' is drawing renewed attention. The freely available book, written by the Cambridge physicist who later served as the UK's chief scientific adviser, lays out the numbers behind renewable energy and Britain's energy choices in plain quantitative terms. Readers continue to praise its clear, ideology-free approach to the energy debate, arguing it remains relevant years after publication.
- 2Vacuum Drying: How Makers Heat Things in a Vacuum▼Vacuum Drying and Making Stuff Hot in a Vacuum https://hackaday.com/2026/10/01/vacuum-drying-and-making-stuff-hot-in-a-v
Hackaday has published a feature on vacuum drying, explaining how removing air lowers boiling points so materials can be dried or heated gently without oxidation. The piece walks through the science and practical DIY approaches for building vacuum drying setups at home. It has drawn modest attention in maker circles, with readers sharing it among DIY and science enthusiasts interested in home lab techniques.
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'Without the Hot Air' refers to David MacKay's well-known book 'Sustainable Energy – Without the Hot Air', which is freely available at withouthotair.com. The site provides free access to the book's analysis of energy consumption and renewable energy potential in Britain, with clear numbers rather than rhetoric. It is drawing renewed attention online, with readers sharing and discussing the resource.
- 4US households hit by surge in electricity shutoffs during record heat▼‘It’s just cruel’: US households hit by surge in electricity shutoffs amid record hot summer
American households are facing a sharp rise in electricity disconnections during one of the hottest summers on record, leaving families without air conditioning and refrigeration as temperatures soar. Advocates describe the shutoffs as cruel, arguing that utility companies are cutting power over unpaid bills despite dangerous heat conditions, prompting renewed calls for moratoriums on summer disconnections.