Facts

Powerful Thinking: (documentation with figures about UK festivals carbon footprint)
http://www.powerful-thinking.org.uk/

Julie’s bicycle: (initiative from the UK about sustainibility in art)
https://www.juliesbicycle.com/

Atmosfair: (a CO2 calculator)
https://www.atmosfair.de/

The green touring guide: (Green Touring Network)
http://greentouring.net

Green Music Initiative: (platform for promoting a climate-friendly music and entertainment industry)
http://www.greenmusicinitiative.de/