diff --git a/3.1.-sharee-JSON-defaults.md b/3.1.-sharee-JSON-defaults.md
index c9dae22..123a492 100644
--- a/3.1.-sharee-JSON-defaults.md
+++ b/3.1.-sharee-JSON-defaults.md
@@ -19,7 +19,8 @@
 | bike_info_html     | o        | text     | returns site/bike_info.html                   |
 | privacy.html       | o        | text     | returns site/privacy.html                   |
 | agb_html           | o        | text     | returns site/agb.html                       |
-| lang               | o        | text   | language iso code                                 |
+| lang               | o        | text   | language iso code                           |
+| co2saving          | o        | text   | CO2 saving info on rental end             |
 | init_map           | o        | object | json object for init map (see example) |
 | last_used_operator | o        | object | json object wit last jused operator data (see example)|