Genghis Khan's Green Massacre
"In other words, one effect of Genghis Khan's unrelenting invasion was widespread reforestation, and the re-growth of those forests meant that more carbon could be absorbed from the atmosphere." More at MNN. Via Metafilter.
![Genghis.jpg?ixlib=rails 2.1](https://splicetoday.imgix.net/uploads/posts/photos/9752/genghis.jpg?ixlib=rails-2.1.4&auto=format&dpr=2&fit=clamp&w=400&s=0c345fd145530646c86562296a8e4400)