The hack is a browser extension that analyzes a travel agency website (flygstolen.se) and inserts CO2 emission data on the page about each flight. It also links to a page that compares these emissions to CO2 produced by other actions (like buying beer).
Choosing holiday flight destinations are some of the most influential choices people make. A flight from Sweden to Asia can add over 30 % to his yearly CO2-emissions. That’s why relevant information should be shown when people are making that choice.
Source on GitHub: Extension: https://github.com/pe3/green_hackathon Comparison page: https://github.com/mikkohei13/Carbonflight
Example link: http://www.luomus.fi/projects/carbonflight/show/?co2=1200
Hackers: Petri Kola, Mikko Heikkinen
Winner of the Stockholm Greenhackathon 2011
