In this highly accessible read, Tim Berners-Lee aims to
demystify the world of carbon footprints and give the reader an 'instinct for
carbon', similar to most peoples' instinct for money. In the same way that you
know that a car costs a lot more to buy than a chocolate bar, Berners-Lee sets
out how everyday objects and activities relate to each other in terms of their
global warming impact, commonly described as carbon footprints.