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Philip Withnall: GUADEC 2020

Submitted by Roy Schestowitz on Monday 14th of September 2020 09:22:40 PM Filed under
GNOME

During the conference, with the help of Bart, I collected some data about the resource consumption of the servers during GUADEC. After a bit of post-processing, it looks like the conference emitted on the order of 0.5–1tCO2e (tonnes of carbon dioxide equivalent, the measure of global warming potential). These emissions were from the conference servers (21% of the total), network traffic (55%), and an estimate of the power used by people’s home computers while watching talks (24%).

By way of contrast, there were estimated emissions of 110tCO2e for travel to and from GUADEC 2019 in Thessaloniki. Travel emissions are likely to be the bulk of the emissions from that conference (insufficient data is available to estimate the other costs, such as building use, food, events, etc.). Of those travel emissions, 98% were from flights, and 79% of attendees flew. The lowest emissions for a return flight were a bit under 0.3tCO2e, the highest were around 3tCO2e, and the mode was the bracket [0.3, 0.6)tCO2e.

This shows quite a contrast between in-person and virtual conferences — a factor of 100 difference in carbon emissions. The conference in Thessaloniki (which I’m focusing on because I’ve got data for it from the post-conference survey, not because it was particularly unusual) had 198 registered attendees, and modal transport emissions per attendee of 0.42tCO2e.

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