Sustainable Energy — Without the hot air

TLDR

The book presents a low‑carbon energy transformation plan for the UK, using accessible bar charts to explain strategies such as population reduction, lifestyle changes, technology upgrades, and energy efficiency, while highlighting realistic options like nuclear, clean coal, carbon capture, pumped heat, wind, and debunking myths about micro‑turbines and hydrogen cars. The analysis shows that modest measures—such as painting roofs white—can have strong impacts, and the book provides a modular framework of options rather than a single prescribed plan.

Abstract

Reader John Roeder writes about a website associated with David MacKay's book Sustainable Energy—Without the hot air. The book is a freely downloadable PDF (or purchasable) book describing an analysis detailing a low-carbon renewable energy transformation route for a large, modern first world industrial country (the United Kingdom). Written for the layman, the work uses vernacular language, e.g., energy consumption and production in a series of bar charts detailing the impacts of necessary strategies such as population reduction, lifestyle changes, and technology changes. MacKay notes that most reasonable plans have large nuclear and “clean coal” or other carbon capture components, lots of pumped heat, wind, and much efficiency improvement. He debunks some sacred cows (roof-mounted micro-turbines; hydrogen-powered cars) while pointing out simple effective technologies such as roof-mounted solar water heaters. Similar modest changes in the U.S. (painting roofs white in the southern half of the country) have strong impacts. MacKay claims that he “doesn't advocate any particular plan or technology,” but “tells you how many bricks are in the lego box, and how big each brick is” so readers can start making planning decisions.