How bad are bananas was the first book I’ve read about sustainability of products. I took it with me during a cycling vacation, so I didn’t have much other books with me, but luckily this book is funny, accurate and inspiring. It explains the carbon footprint of almost everything in a very fascinating way. It describes the CO2 emission of an email message, a plastic bag up to vegetables, traveling or a world championship socces.

One of the best things of this book is that Mike Berners-Lee explains why the exact numbers are so hard to find. For example the CO2 emission for a kilogram plastic is so much depending on the location of production, type of plastic etc. But he uses averages in a very comparable way, so that it’s very easy to understand the proportions of each subject related to each other.