diff --git a/journal/Journal.md b/journal/Journal.md
index 95cb7995777e82c5f165d1e2d92a47037d58bdfb..96f3bba6bd8bb7b5f5d3953ec1d5264bbb6d16f9 100644
--- a/journal/Journal.md
+++ b/journal/Journal.md
@@ -11,4 +11,6 @@ Dérniere page lue : [page](https://lms.fun-mooc.fr/courses/course-v1:inria+4101
 
 Fin du module 2.
 
-Pour la correction d'ortographe en français: [MerciApp](https://www.merci-app.com/)
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+Pour la correction d'ortographe en français: [MerciApp](https://www.merci-app.com/)
+
+Interesting: [CO2 concentration](https://en.wikipedia.org/wiki/Keeling_Curve)
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