Almost all solar PV panels are now produced in China, where the electric grid is about twice as carbon-intensive and about 50% less energy efficient than in Europe.
Despite technological advancements since the Industrial Revolution, cooking remains a spectacularly inefficient process.
The trend towards small-scale, decentralised power production means that rope transmission might have a place in our energy system again
The present approach to pedal power results in highly inefficient machines.
Only four years after the first experimental trolleybus, an ordinary steam canal boat was adapted to a trolleyboat.
Fast recharging times generate lots of excitement, but what seems to be forgotten is that they can lead to a fabulous amount of peak demand.