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Off the top of my head. Try and use/buy organic cotton garments (even for your Scala world swag!). Limit the usage of plastic (incl toothbrush). Visit Matera (or any of the current/forthcoming European Capital of Culture). Fly less; travel by train more. Write more (not code!)
I fly a lot, but one of last year's goals was to fly less (which I did) and next year I inevitably will fly less. Also,pic.twitter.com/LYWbABjcyx
