Transportation: Today, electric cars need as little as 15 kWh for 100 kilometers while models running on oil need 70 to 90 kWh. Hence, electric cars are already five times more efficient than current conventional models....A full high speed train only consumes as little as 3 kWh per passenger, and biking consumes even less: 1 kWh.
Housing and buildings: The author is an advocate of both retrofitting and reducing the winter thermostat from 20°C to 17°C, which alone brings savings of 30% (page 292). By combining both solutions, David MacKay halved his heating bills. With a coefficient of performance (COP) of 4 to 5, heat pumps retrieve the heat contained in the outside air or soil and distribute it indoors. Another advantage of this solution is that it can bring air conditioning during hotter days.
The author is David J.C. MacKay. You can read the book online.
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