diff -r 16bf04564423 -r 3366c10092cd templates/ozoneloss.html
--- a/templates/ozoneloss.html	Mon May 12 13:44:14 2014 +0200
+++ b/templates/ozoneloss.html	Mon May 12 14:51:30 2014 +0200
@@ -7,11 +7,11 @@
       </div>
       <center> 
 
-      <img src="/static/images/clams_o3col_11032812.png">
+      <img src="/static/images/clams_o3col_11032812.png" alt="O3 column">
       <br>
 
       <br>
-      <img src="/static/images/clams_do3col_11032812.png">
+      <img src="/static/images/clams_do3col_11032812.png" alt="Delta O3 column">
       </center>
    </div>
 </div>