Based on our previous research with Londonon and using the HBert Tool developed by Hawkins\Brown we worked out how many bowls of Onion Soup could be made with the same amount of energy needed to make 1 m3 of each material.

These bowls can then provide enough calories to fuel the most efficient/sustainable form of transport - cycling. In the case of a material like aluminium 1m3 is enough to cycle 63,4440 kms, or to get to and from work for 10.5 years...