diff --git a/site/docs/plugins.md b/site/docs/plugins.md
index bb3c1787..b9ab4bbb 100644
--- a/site/docs/plugins.md
+++ b/site/docs/plugins.md
@@ -543,6 +543,7 @@ You can find a few useful plugins at the following locations:
 - [grunt-jekyll](https://github.com/dannygarcia/grunt-jekyll): A straightforward [Grunt](http://gruntjs.com/) plugin for Jekyll.
 - [jekyll-postfiles](https://github.com/indirect/jekyll-postfiles): Add `_postfiles` directory and {% raw %}`{{ postfile }}`{% endraw %} tag so the files a post refers to will always be right there inside your repo.
 - [A layout that compresses HTML](https://github.com/penibelst/jekyll-compress-html) by [Anatol Broder](http://penibelst.de/): Github Pages compatible, configurable way to compress HTML files on site build.
+- [Jekyll CO₂](https://github.com/wdenton/jekyll-co2): Generates HTML showing the monthly change in atmospheric CO₂ at the Mauna Loa observatory in Hawaii. 
 
 #### Editors