diff --git a/module3/exo3/co2_mlo_cumsum.png b/module3/exo3/co2_mlo_cumsum.png
new file mode 100644
index 0000000000000000000000000000000000000000..6c5522a058e32ef28c3f613da9edc8480a88e787
Binary files /dev/null and b/module3/exo3/co2_mlo_cumsum.png differ