commit 3809fc58338d38fca35e09fbea72f1b5aec2ec56
parent 86a3c641a15225723c7fd823a4f4513616d04c44
Author: Antoine Amarilli <a3nm@a3nm.net>
Date: Tue, 2 Sep 2025 16:26:58 +0200
explanation
Diffstat:
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/2025/README.md b/2025/README.md
@@ -106,5 +106,20 @@ without updating them to ensure that the methodology is comparable.
## Trends relative to 2024
-The number of onsite participants is a little higher, and the number of nonlocal onsite participants is a little lower. The footprints per nonlocal participant are significantly lower -- perhaps the conference venue is more central?
+The number of onsite participants is a little higher, and the number of
+nonlocal onsite participants is a little lower. The footprints per nonlocal
+participant are significantly lower: a 22%-27% decrease (depending on whether
+locals are included or not). Given that the profile of "long trips" is similar
+to 2024, we ascribe this change to the location being more central.
+
+Indeed, if the same participants had come to Bordeaux (the 2024 venue),
+from/to the same places and the same transportation means, then the average
+footprint per onsite non-local participant would be 316 kgCO2, and per onsite
+participant 285 kgCO2e, which would then be slightly superior to the 2024
+edition.
+
+Of course, organizing the 2025 conference in Bordeaux would have somewhat
+changed who attends and how they travel -- but maybe this would not be a large
+change. So our best hypothesis is that essentially the same people came, by
+the same means, but the total travel to Saarbrücken was smaller.
