diff --git a/module3/exo3/exercice.ipynb "b/module3/exo3/Evolution de la concentration atmosph\303\251rique en dioxyde de carbone (CO2).ipynb"
similarity index 99%
rename from module3/exo3/exercice.ipynb
rename to "module3/exo3/Evolution de la concentration atmosph\303\251rique en dioxyde de carbone (CO2).ipynb"
index 0d829ea78da11c9d7dd7c6204e9639798f413b13..0769b6ce4e7af7cde77fd346d48c6d61b925b3cc 100644
--- a/module3/exo3/exercice.ipynb
+++ "b/module3/exo3/Evolution de la concentration atmosph\303\251rique en dioxyde de carbone (CO2).ipynb"	
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Evolution de la concentration atmosphérique en CO<sub>2</sub>"
+    "# Préliminaires"
    ]
   },
   {
@@ -16,7 +16,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 97,
+   "execution_count": 29,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -41,7 +41,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 98,
+   "execution_count": 30,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -60,7 +60,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 99,
+   "execution_count": 31,
    "metadata": {
     "scrolled": true
    },
@@ -468,7 +468,7 @@
        "[3173 rows x 2 columns]"
       ]
      },
-     "execution_count": 99,
+     "execution_count": 31,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -487,7 +487,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 100,
+   "execution_count": 32,
    "metadata": {},
    "outputs": [
     {
@@ -526,7 +526,7 @@
        "Index: []"
       ]
      },
-     "execution_count": 100,
+     "execution_count": 32,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -539,7 +539,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Analyse des concentrations observées"
+    "# Analyse des concentrations observées"
    ]
   },
   {
@@ -551,7 +551,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 101,
+   "execution_count": 33,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -568,7 +568,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 102,
+   "execution_count": 34,
    "metadata": {
     "scrolled": true
    },
@@ -919,7 +919,7 @@
        "[3173 rows x 1 columns]"
       ]
      },
-     "execution_count": 102,
+     "execution_count": 34,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -940,7 +940,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 103,
+   "execution_count": 35,
    "metadata": {},
    "outputs": [
     {
@@ -998,16 +998,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 104,
+   "execution_count": 36,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "<matplotlib.axes._subplots.AxesSubplot at 0x7efbd4516ac8>"
+       "<matplotlib.axes._subplots.AxesSubplot at 0x7fdaf683bda0>"
       ]
      },
-     "execution_count": 104,
+     "execution_count": 36,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -1038,7 +1038,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 105,
+   "execution_count": 37,
    "metadata": {},
    "outputs": [
     {
@@ -1047,7 +1047,7 @@
        "31.942819190992758"
       ]
      },
-     "execution_count": 105,
+     "execution_count": 37,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1072,16 +1072,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 106,
+   "execution_count": 38,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "<matplotlib.axes._subplots.AxesSubplot at 0x7efbd4373cc0>"
+       "<matplotlib.axes._subplots.AxesSubplot at 0x7fdaf69d6780>"
       ]
      },
-     "execution_count": 106,
+     "execution_count": 38,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -1116,7 +1116,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "##  Estimation des concentrations à venir"
+    "#  Estimation des concentrations à venir"
    ]
   },
   {
@@ -1132,7 +1132,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 107,
+   "execution_count": 39,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -1156,7 +1156,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 108,
+   "execution_count": 40,
    "metadata": {},
    "outputs": [
     {
@@ -1183,16 +1183,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 109,
+   "execution_count": 41,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "[<matplotlib.lines.Line2D at 0x7efbd4344e80>]"
+       "[<matplotlib.lines.Line2D at 0x7fdaf4cb1940>]"
       ]
      },
-     "execution_count": 109,
+     "execution_count": 41,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -1228,7 +1228,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 110,
+   "execution_count": 42,
    "metadata": {},
    "outputs": [
     {
@@ -1237,7 +1237,7 @@
        "423.89403068381216"
       ]
      },
-     "execution_count": 110,
+     "execution_count": 42,
      "metadata": {},
      "output_type": "execute_result"
     }
diff --git "a/module3/exo3/Evolution de la concentration atmosph\303\251rique en dioxyde de carbone (CO2).pdf" "b/module3/exo3/Evolution de la concentration atmosph\303\251rique en dioxyde de carbone (CO2).pdf"
new file mode 100644
index 0000000000000000000000000000000000000000..c6d0acfafeb1dec77bd6ce10854ca5231af9f064
Binary files /dev/null and "b/module3/exo3/Evolution de la concentration atmosph\303\251rique en dioxyde de carbone (CO2).pdf" differ