The CUCC Loser expo has this policy:I am interested in what other trips have done regarding offsetting and other efforts to reduce carbon
Travel to and from Expo will be carbon offset. This will be calculated on an individual basis and added to the expo bill. Expedition members are responsible for supplying information on fuel usage (travelling by car) or journey details (train or plane) for the purposes of carbon offsetting calculation.
There is actually quite a lot of nuance to this and I'm failing to find those details written down on the website. But in summary:
* Flight emissions are calculated with atmosfair.de
* Train emissions are calculated with ecopassenger.org
* Bus emissions are calculated
* Car emissions are calculated either with ecopassenger.org, or from actual fuel receipts/consumption information, and shared amongst occupants (fiets.uk, myclimate.org and viamichelin all provide reasonable calculators with different pros/cons - fiets.uk was the most accurate when I tested it).
* A 'whole trip' approach is used so if you fly over from the states and go to the UIS congress and the Loser expo, your emissions are calculated for the whole trip from the US, not just from the UIS site in France, then back to the US. This is mostly to stop people taking the piss by claiming to be going on a personal trip to visit the salt museum in Altaussee, then doing 'expo offset' travel of 5 miles from there to expo, and to make life simpler for the treasurer.
* Offsets are bought from Atmosfair (current price €23/tonne)
The expedition publishes its emissions numbers in reports and was the first UK expedition to formally adopt a compulsory offset policy so far as I know.
There has long been a policy of optimising travel generally (e.g. filling up cars) and lower-carbon travel methods (bus, train) have been encouraged for some years, although largely informally. However we remain unable to actually _prevent_ people who can afford it doing unhelpful things like drive out solo in a large/inefficient vehicle if they choose to.
The other significant change has been to stop buying loads of food and gear in the UK and driving it to Austria, but to buy as much as possible locally and order things to be delivered in Austria.
And more than 20 years ago we stopped driving a trailerfull of tents, cookers, pots and pans, tarps, barrels, bolts, rope, stretcher, 1st aid kits, tools etc back and forth every year, storing as much as possible in Austria. That was a small emissions gain and big faff-reduction.
Nearly everything is re-used from one expedition to the next, and IT equipment is all 2nd-hand so whilst obviously some stuff has to be bought new every year, excessive gear churn is largely avoided.