> Here is an interesting optimization problem: it turns out the > most polluting part of a conference is people taking jets to > fly to the conference. Minimize that and the planet wins. Simple solution. Only allow people to attend if they take a train or bus to the conference. Enforce this by including tickets for train or bus (your choice) when registering to attend a conference. It makes trans-continental conferences impossible (although you might add an ocean liner option) but that is not necessarily a bad thing. What is wrong with have several different continental chapters of the IETF, given that all decisionmaking is supposed to be done online, not in meetings? --Michael Dillon P.S. if you look at a map of Europe, Prague is rather centrally located an makes an ideal location for a "green" conference like this. _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf