Treehugger is a green consumer blog with a mission to bring a sustainable lifestyle to the masses. Its ethos, that a green lifestyle does not have to mean sacrifice, and its positive, upbeat feel have attracted over 1.8m unique users a month. Consistently ranked among the top 20 blogs on Technorati, Treehugger has 10 staff but also boasts 40 writers from a wide variety of backgrounds in more than 10 countries around the world, who generate more than 30 new posts a day across eight categories, ranging from fashion and beauty, travel and nature, to science and technology. Treehugger began as an MBA class project four years ago and says it now generates enough revenue from sponsorship and advertising to pay all its staffers and writers. It has developed a highly engaged community and has added popular services like TreeHugger.tv, and a user-generated blog, Hugg. It was bought by the Discovery Channel last year for a rumoured $10m.